I have inherited and early version Mitutoyo digital caliper, #500-115. This version has no battery door. Instead, you remove four tiny screws, remove the plastic cover from the working head, replace battery, etc. The previous owner took some time to replace the battery and meanwhile lost the four screws. The device functions reliably other than that. I can't find any resources from Mitutoyo or repair shops to supply the screws. Does anyone know the thread specifications? Any resources to find these screws?
Patrick
Fremont CA