In any base plate there are always two holes drilled under the pallet jewels: there must be an evident reason to drill those holes, but I can't figure it out. Would you kndly help me, please ?
The picture is from a small Elgin, a 10s, 17j, cal. 314

HI Mario, I hope this answers your question (If it loads up properly).
Rgds Peter

OOPS, Not good enough, let's try again..

thanks, Peter ... inspection holes, absolutely evident (once you know). Tryly, it never occurred to me, I always handled naked movements leaning on something so no light was going thru. After reading I simply lifted the movement away ... and that's it!
Most conclusive answer, thanks again.