Archived posting to the Leica Users Group, 1998/12/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I am hoping someone can identify why the shutter speed knob on my IIIc differs from most. Rather than a round knob with a knurled edge, my IIIc is fitted with a "tri-lobal" knob. That is it is round but has three projections on it. The overall shape is not unlike that of a Wankel engine rotor. At the base of the knob (i.e. next to the body) there is a cam whose peak starts at the 1/40 marking and ends about half way to the 1/60 marking. The knob looks genuine in all respects, the material and finish are identical to the rest of the camera, the lettering matches the rest of the camera and is consistent with "standard" knobs. Further information. Serial number is 379600 which places it in the war time production. It has had a majour overhaul at some time as the body has the later style (rewind lever is NOT raised on a step). I suspect this knob may have originated for some special application during the war, but would be interested to know its purpose etc. Thank you. - -- Richard Urmonas rurmonas@senet.com.au