Rev, The pin holes were for the early panoramic adapter. Jerry Kenneth Frazier wrote: > On Jan 25, 2006, at 5:15 PM, Richard Knoppow wrote: > >> The grooved base was introduced around 1953. New backs with this >> base were made available for earlier cameras >> > How, then, were the non-grooved bases fitted to a tripod? The pin > holes are present on the front of the camera body. What were they > used for? Ken-----------------------------------The Rev. Kenneth > FrazierConnecticut Conference, United Church of ChristCurrent Leica > Photography (PAW):http://tinyurl.com/6sc2r Current Medium Format > Photos:http://tinyurl.com/bjvfn > > > ---------------------------------------------------------------- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.375 / Virus Database: 267.14.23/240 - Release Date: > 01/25/2006 > >