Back a decade & more ago when I was tracking "Bay" wrench auctions, several aluminum examples sold -- also one in one of the late-1990s collection dispersal auctions held here in York. So the aluminum ones have been around for quite a while -- I just don't know that we know what they came with originally.
I suspect that RITTER & WEBER were dental chair adjustment tools (Ritter Dental Mfg. Co, Rochester, NY; Weber Dental Mfg. Co, Canton, OH )