I met with Al and a few other guys for breakfast this morning, and Al brought the locomotive that is the subject of this thread. I snapped a picture of it on the restaurant table:
It is a nice, clean 833 Marx windup. This one would have been toward the end of 833 production (available through 1953 - I know the guide says '52, but I have seen them advertised in 1953, also). This one has the black motor sideplates and 17 spoke diecast drivers. Early 833's would have shiny motor sideplates and stamped metal 7 spoke wheels, then Marx went to black motor sideplates and stamped metal 7 spoke wheels, then toward the last went to the diecast 17 spoke wheel seen here. The 17 spoke driver on the 833 is different from most of the 17 spoke drivers seen on the later Marx windups; this one has a cast post for the siderod, most of the later 17 spoke drivers have a hole instead of the post and the siderod has a Z-bend that keeps it in place. Anyway, Al has an all original 833 with the proper motor and drivers, and he says it runs fast! Looks like a good deal to me!
PS - tcox009, how about some pictures of your clockworks? Sounds like you have some neat locomotives.