ST1655 Automatic Watch – Multi-Complication AliExpress Build by Elliot Coll
This article documents the assembly of a multi-complication automatic watch built around the ST1655 movement, using a complete kit sourced from AliExpress. The project is presented through a full build video by watch modder Elliot Coll and is featured here with independent editorial context.
The point of this build is not luxury finishing or long-term pedigree. It is mechanical curiosity. The ST1655 kit shows how much complication can be bought at a very low price, and why builders need realistic expectations when complexity rises faster than cost.
Why This Build Is Interesting
Most affordable automatic builds are simple: hours, minutes, seconds, maybe a date. This one is different because the ST1655 movement adds several calendar-style displays and a moonphase-style indication. That makes it visually busy, mechanically more ambitious, and more demanding to understand.
For a beginner, the appeal is obvious. A complete automatic kit with multiple displays feels like a shortcut into high-complication watchmaking. The reality is more complicated. More functions mean more setting rules, more things to align, more ways to misunderstand the movement, and more reasons to treat the build as a learning project rather than a rugged everyday tool.
Watch the Original Elliot Coll Build Video
The original video below is from Elliot Coll. It gives the build its proper attribution and shows the assembly process behind the finished watch.
Project Overview
- Movement: ST1655 automatic.
- Displayed functions: hours, minutes, date, day, month, year, 24-hour display, and moonphase-style display.
- Build type: complete watch kit.
- Crystal: mineral glass.
- Water resistance: not rated / non-water-resistant.
- Approximate price: around 65 USD at the time of the original build context.
- Source: AliExpress complete kit.
The kit format matters because this is not a custom parts selection in the same way as an SKX or NH35 mod. The parts are designed to arrive as one package. That makes sourcing easier, but it also means the builder has less freedom to choose better case finishing, crystal material, water resistance, or dial layout.
About the ST1655 Movement
The ST1655 is a Chinese automatic movement associated with Seagull-style affordable complicated movements. Its appeal is obvious: many functions, automatic winding, and a price that makes the movement feel almost experimental.
It is important to say what this is not. This is not a perpetual calendar. The displays require manual understanding and adjustment. Owners need to be careful around date-change periods and should not treat the calendar functions like a high-end perpetual mechanism that quietly handles everything on its own.
What makes the ST1655 compelling is mechanical ambition at a low cost. What makes it risky is the same thing. More displays create more opportunities for confusion, mis-setting, alignment problems, and unrealistic expectations.
Complications Are Not Just Decoration
A complication is any function beyond simple timekeeping. Date, day, month, 24-hour indication, and moonphase-style displays all add information to the dial. They also add visual density. That can make a watch feel more interesting, but it can also make it harder to read.
In a watch like this, the dial is part of the experience. You are not buying quiet minimalism. You are buying a small mechanical dashboard. The question is whether that dashboard is charming, useful, or simply busy. That depends on the wearer.
For broader movement basics, read Automatic vs Quartz vs Mechanical Watches.
Assembly Complexity and Required Patience
While the kit format makes sourcing simple, assembly is not the same as building a basic three-hand watch. Movements with multiple displays introduce more sensitivity around alignment, setting, dial-side clearance, and correct handling.
That does not mean the build is impossible. It means the builder should approach it with patience. The more complicated the movement, the more important it becomes to avoid force, understand the setting positions, protect the hands and dial, and test the functions before treating the watch as finished. That is also why a separate guide to common Seiko modding mistakes is useful even outside simple NH35 builds: most errors come from rushing small mechanical steps.
This is where affordable mechanical kits can teach real lessons. They are not only about getting a cheap watch. They show how much respect even inexpensive mechanical parts require.
Crystal, Water Resistance, and Daily Wear
The kit uses mineral glass rather than sapphire. Mineral glass can look clear and is common at low prices, but it does not offer the same scratch resistance as sapphire. Combined with the lack of water resistance, this makes the watch better understood as a mechanical learning project than as a rugged daily tool.
That does not mean it cannot be worn. It means expectations should be realistic. Avoid water exposure. Do not treat the watch like a diver. Understand that a highly affordable multi-function automatic watch will have compromises.
For general buying judgment in a similar price mindset, see Automatic Watches Under $500.
Value Perspective
At roughly the price of many straps or bracelets, a complete automatic multi-function watch kit is hard to ignore. That is the value story: not luxury, not prestige, but access. It gives curious builders a way to explore complications without spending serious money.
The danger is confusing access with equivalence. This does not replace a higher-end complicated watch. It does not offer the same finishing, durability, water resistance, regulation, or long-term confidence. It offers hands-on curiosity at an approachable price.
That is still valuable, as long as the buyer understands what kind of value it is.
Where This Build Fits in Watch Modding
This ST1655 build fits a different part of watch modding than a Seiko NH35 diver or SKX-style build. It is less about creating a rugged custom daily watch and more about experiencing mechanical complexity through an accessible kit.
That makes it useful for The Watcher HQ readers because it shows the range of modern modding culture. Some builds are about personal style. Some are about tool-watch function. Some are about learning. This ST1655 kit sits mainly in the learning and curiosity category.
Related reading: Should You Build Your Own Watch?, How to Build a Seiko Mod, and Seiko SKX007 Mod – Blacked-Out NH35 Build by Elliot Coll.
How This Differs From a Workshop Build
This is an Elliot Coll build article, not a Rexx Timepieces build. That distinction should stay clear. The value here is attribution, analysis, and practical context around an affordable complicated kit.
A workshop-led custom build usually starts from a different place: dial design, case direction, parts compatibility, personal meaning, finishing, or a specific wearable result. If the goal is a personal custom mechanical watch rather than an AliExpress kit experiment, Rexx Timepieces custom watch builds are the more relevant path.
Final Thoughts on This ST1655 Automatic Watch
This ST1655 automatic watch build shows how far affordable mechanical kits have come. It offers a surprising amount of complication for very little money and gives curious builders a hands-on way to explore calendar-style functions and moonphase-style display.
The right takeaway is not that this replaces more refined complicated watches. The takeaway is that affordable watchmaking has become broad enough to include real mechanical curiosity. In the right hands, and with the right expectations, that can be genuinely enjoyable.
