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Making special tools for camera repair.

Commonly found on cameras, these screws are variously described as two-hole screws, pig-nose screws, or snake-eye screws. Probably many camera manufacturers had special tools available for their service centres to use. There are various approaches that will work with these sorts of screws, and the type of tool that will work best in particular case will depend on the the size of the fastener, and access for the tool. I have used a mixture of special screwdrivers, modified circlip pliers, a neat pin-wrench supplied by Beljan, and spanner-wrenches of various designs. If you are expecting to have to deal with one particular fastener of this sort more than once, it probably makes sense to make a special tool, especially if there is no freely available commercial product. One advantage of a special tool is that being tailored for the job, it can be expected to be the most convenient in actual use. The Kodak Retina cameras, which I have most experience with, had various screws of this type. On Retina and Retinette cameras from the Retina IIa era, the advance lever, and many of the rewind knobs of later models, used this style of fastener. Another use was on the screw holding the meter settings dials on the Retina IIIc and later cameras. The screw used on the earlier IIIc cameras used the same pin spacing as the screws mentioned above for the Retina IIa film advance. The screws used on the meter dials of the later IIIc with the single-range meter, the meter dials on the IIIC, IB, and original Retina Reflex models, and the screw holding the top cover on the Reflex S, III, and IV all need the same slightly different tool with different pin spacing. The rangefinder pivot screws on IIIc and later cameras also used snake-eye screws of a different size again. The screw on the top of the film advance shaft on IIIc and later models had notches instead of holes, so need a somewhat simpler screwdriver to be dealt with conveniently. Using 7mm, 6mm, and 5mm wide flat-blade screwdriver tips, I now have suitable tips for the Retina IIa advance lever and related screws, the IIIC meter dials & Retina Reflex top cover screws, and the screws on the top of the film advance shafts. These are all 1/4” (6.35mm) standard interchangeable screwdriver tips.