@rexquando65
Service dials for 861 movements are just the current production dial at time of service. Hence there are no service dials for 861 regular production speedmasters post 1969.
Speedmaster101 talks about service dials for 321 movements that required slightly different dial feet and are not interchangeable.
The 861 movement started with the 145.022 in 1969. I hope this clears up any confusion.
Your dial is clearly a domed dial, and no step dials exist with the "Speedmaster" font on yours with what is called a "Drop S, drop R" The step is just outside the minute markers, on yours you can see a slight dome there.
While you have a nice looking piece, the older perfectly lumed spear type chrono hand from a 145.012 (1969 at latest) or earlier is a flag. The dial on yours ran from September of 77 through the mid 80's.
The only way to really figure out what is going on with this piece is to check the movement and serial number to see what exactly it is. The caseback inscription would also be needed to look at for correctness. But the caseback is a 145.022-71 at its earliest.
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