This was unique to the ST5 movement and only for ...

the ones with the upgraded 21,600 bph movements. The earlier 18,000 bph movements has had un adorned plates likr this...


But to confuse the issue, there are also plain jane ones that beat at 21,600 bph. These ones came in watches with red printing that was not correct for the watch so they were probably cobbled together from left over parts and combined with these dials to take advantage of the burgeoning market for vintage 'NOS' Chinese watches.

Since I've had very up and close looks at three of these, I can safely say these are not NOS. They have all had someone inside them and many of the external parts show signs of wear if not wearing. The minute hand on the one pictured looks like it floated around in a parts box for a couple of decades. The other watches look like baggage handlers have been inside them

------------------------------------------