My Columbian was my Grandfather's too, Ted. I'll send you the pic, which also shows what it is mounted on, a massive sawhorse type support made of I-beams. I could hit something in thats vise with an 8 lb. sledge hammer and the vise would not budge.

My post vise in my little shop is mounted on a steel support I welded up, consisting of a steel plate on top of three legs of 2" galvanized pipe which go through the wood floor and into the ground under the shop, around which are poured several bags of Sakrete. It doesn't budge, either.

SRH

May God bless America and those who defend her.