16520 Chrono counterweight variation

[kinyik]

Hi all, I’ve noticed that the counterweight on the 16520 came in slightly different shapes. Is that something anyone else has experience with? I’m wondering if they could be service hands or hands meant for later models. I’ve looked into 116520s and they’re mostly rounded counterweights.

This is from an A serial 16520 with a recent RSC service: pointed, sharp tipped counterweight:









The other variant is a more rounded counterweight without a sharp tip. It’s obvious without a loupe as these are rounded and the taper is far less significant.









Many thanks all!


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