>>2955341
That 'post' is just a pivot link. Pic is from the video below and I believe it's the same movement design, it has the 13244 number.

The backside of that watch is a clusterfuck of shit you have no business dicking around with.

https://youtu.be/-yJWAvOrFyw?list=PLNQb5_nzHdtVHWJ_iaPHvWmeXQ5AAmgnQ&t=2819

My advice is stop running it, disengage the chrono and throw it in a box with a packet of desiccant and forget you have it until you become a millionaire and can afford to have it restored. If you keep running it in its current condition you're going to grind away the teeth on those tiny ass gears. I can already see damaged teeth in that pic on the chrono idler gear.