Many watch collectors who own VS Factory Rolex watches equipped with the classic DanDong 3235 no-card movement often ask one question: where is the movement serial number located?Unlike traditional watch codes printed on the case exterior, the genuine VS 3235 movement serial number cannot be seen from the outside. You need to open the case back to check the real movement code.
After removing the case back, you will find the unique serial number engraved on the main bridge plate directly below the shock absorber position.The texture of this bridge plate features a special fingerprint-like grain finish, which is a typical detail of high-end VS Factory 3235 movements. The serial number consists of letters and digits, such as the commonly seen code format: 1S830113.
Each production batch has different independent serial numbers. This set of codes is equivalent to the exclusive ID card of the movement, and every single genuine VS 3235 movement has its own unique identification code.In addition to the movement serial number inside the mechanism, there is another independent matching code on the inner rehaut at the 6 o’clock position of the watch dial.You can find engraved codes like 59T724 on the inner ring. This inner rehaut code and the movement serial number correspond mutually in official factory production.
Why are these two sets of codes so important?The biggest function is to prevent movement replacement and part swapping.In the secondary watch market and resale transactions, some unscrupulous sellers may replace original high-grade movements with ordinary movements. By cross-checking the inner rehaut code and the movement serial number, buyers can effectively verify whether the watch is original and unmodified.It is worth reminding all watch enthusiasts that opening the case back requires professional watchmaking tools and skilled operation.Non-professionals are not recommended to disassemble the watch privately. Improper operation may scratch the case, damage the waterproof structure, or affect the stability of the movement. If you need to verify the serial number, please ask a professional watchmaker for inspection.
To sum up:The VS Factory DanDong 3235 no-balance-spring movement serial number is located on the bridge plate under the shock absorber. Combined with the 6 o’clock inner rehaut code, it is the most practical and accurate method to identify original VS 3235 movements and avoid swapped parts.
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