Croton Chronomaster Pusher Size

Hi everyone, figured I'd throw this out to the room and see if anyone had any specific knowledge. I recently picked up a Croton Chronomaster that's missing one of its pushers. I doubt I'll get lucky and find the exact replacement part I need (unless someone here has that too?), so I was looking to just replace both pushers with ones that are as close as possible. I'm ok with slight cosmetic differences, but I want to make sure that the new pushers are compatible with the case. My issue is that, even with good measuring tools, I'm not sure whether I need a pusher tube with a 2.5mm or a 2.54mm thread diameter. I see a lot of the generic Chinese assortments have 2.5, but not 2.54. I assumed it was just a rounding error on their part, but now I'm not so sure. If anyone has any experience with this it'd be much appreciated. Thanks in advance.

In the unlikely event that someone down the line is also looking for an answer to this, the 2.54mm thread was a perfect fit. I bought two of these (https://www.jewelerssupplies.com/chronograph-pushers-individual-901.060 Select Size.html) and they were nice screw in replacements. A little shorter than the original but they look good and actuate the chrono fine.