Thru the years Graco made some very subtle tweaks to their Merchandisers. They are the only manufacturer to have this long of a production run and keep their Work Stations unchanged.
Here are two different ID plates; displaying the change from ‘47 to ‘48
The most common version of this bench came with lower square handles and this round bucket parts-washer.
In some of the later model Graco’s, the washing bin was a bowl shape, and the lower bench had a simple round pull knobs present.
About half of the models have an electrical plug on the back tool-board as well as the right side of the lower bench
Recently we found out that these Oil Bar benches, with the drain in them, were 4 inches less deep than the standard merchandiser benches