That would be 1/18th Which happens to be the scale of the model I just got of the Cowboy Cab!

Justin Whitlock makes scale models of classic arcade cabs and when I contacted him about a custom he was very happy to oblige. So, I sent him drawings and art and more drawings (all to 1/18th scale already) and this was his reply:

OK, that’s the best info I’ve gotten for a custom request yet, thanks!

It took him a little while to complete the model and apparently he had some basement flooding problems which sidetracked his whole operation for awhile, but today he sent me this pic and my model cab is in the mail!