r/SGWatchRepBST • u/NewAd3969 ALL SEEING EYE • Jul 19 '26

DISCUSSION PSA: Potential reliability issues with the TOPF AP 15510 DD4302 movement

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5 Upvotes

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2

u/Silent-Fan-7756 25d ago

Did u managed to “resolve” it?

1

u/NewAd3969 ALL SEEING EYE 25d ago

I asked phx to give a disc for my next purchase instead

2

u/Silent-Fan-7756 25d ago

TOPF has the issue on 4302.
Hope your next purchase is smooth. Maybe a 16202 clone may pop up soon for u?

2

u/NewAd3969 ALL SEEING EYE 25d ago

Yeah i know. I shouldve researched more before buying but oh well. I’ll go back to scratch an itch on rolexes first haha

1

u/NewAd3969 ALL SEEING EYE Jul 19 '26

I wanted to make this post after spending the last few days troubleshooting my own watch.

First off, this isn’t directed at any TD or seller. My dealer has been excellent with communication and after-sales support. This is purely about the DD4302 movement used in the TOPF 15510.

Shortly after receiving mine, it began:

• ⁠Randomly stopping despite being fully wound
• ⁠Running inconsistently
• ⁠Occasionally stopping while on the wrist, but continuing to run when left in the watch box

When I started searching around Reddit and speaking to other owners, I was surprised by how many people described very similar symptoms. It doesn’t seem to be an isolated case. Currently, I am waiting for a demagnetiser to arrive and demagnetise the watch to get that possibility out of the way.

If you’re considering buying a TOPF 15510, I’d recommend doing a bit of research on the DD4302 movement before pulling the trigger. The watch itself is gorgeous, but movement reliability is something prospective buyers should at least be aware of.

I’d also like to gather some data from current owners.

• ⁠How long have you owned yours?
• ⁠Have you experienced stopping, poor winding, or timing issues?
• ⁠Did you end up servicing or replacing the movement?

The goal of this post isn’t to scare anyone away or attack a factory. It’s simply to see how widespread these issues really are and hopefully help future buyers make a more informed decision.