Thanks for the information about the Reed 403 1/2R Vise. I recently found one on Craig's List and it too was missing the pin. Using your dimensions and my old Logan Lathe along with an old bolt, I now have a new replacement pin and it works great.
The pin had probably been lost for a while...
Thanks guys for the support and the great pictures. Does anybody out there know how I can find out when my 43SJ was made or how many were made? The vise is in real good condition with no signs of damage (other than some light rust) but I cannot find any stamped numbers like other members have...
Have you found any info on the Desmond Simplex? I have purchased a Desmond Simplex 43SJ which has a pivoting rear jaw and, like you, am having a hard time finding info about it.
Thanks for your help.