Voigtlander Vitomatic I Filter Type_Special Effects and there is an anti-twist

and there is an anti-twist ridge along the full width of one short edge

The top plate has a 1/4” thread

well designed safelight for darkroom printing

Leitz Summarit 5cm f1

Voigtlander Vitomatic I Filter Type_Special Effects and there is an anti-twistThe Voigtlander Vitomatic I is a slightly bulky scale focusing 35mm camera with a big, bright viewfinder and a reasonably effective lightmeter. This Vitomatic I is in good cosmetic condition overall, with some wear on the lens barrel and some discolouration on the adhesive used to secure the lightmeter readout window. Shutter speeds are good from 1 15s and up, and there's some oil on the aperture blades which does not affect function. So, not perfect,