It's very interesting that the 3050 has several slightly unusual parts and at least one specific only to the 3050. These include the dial reflector ring, the stem length (a bit long), the caseback ring which fits only two models I know of and the movement spacer ring.
I've found part numbers on all but the specific stem and the movement ring. I would think the movement ring would be common to other models? Can anyone help with part numbers? Needing both if anyone has them.