[cletrac (RIP)]

Colin,
I've attached another page from the 1A2 parts list. This shows the 2nd style battery attachments which would be the right ones if the 1A2 got used on the 12 cab trucks. As a general rule according to Gregg the 1A2s were used on cab 11s and the 1B2s were used on the cab 12s, but the odd 1A2 straggler could have been used on cab 12s. In the parts list page it shows wood screws holding the holding straps for the wire reel lockers so the whole 2nd style battery attachment is made of wood. You can see in the photo that the vertical dividers for the reels are dadoed into the horizontal boards.
The radio table is all metal construction. The handle on the sliding shelf is held on with 5/8" long rivets so that vertical flange must be folded double to need that size rivet. It looks like you'd have to have the drawer open to support the shelf when you wanted to use it.
The only help I can give you on measurements is the location of the mounting bolt holes. Two of the holes are 6 3/8" from the front body panel and the other two are 27" from the front panel. Two of them are 1 1/2" in from the outer vertical body panel and the other two are 11" in from the outer panel. Two of these bolts would be in line with the rear vertical part of the table and the other two would be just ahead of the front of the drawer.
Some other differences on the 2nd type body : two tail lights instead of one. Two seats instead of three. Another battery holder bolted on with the centre seat bolt holes. Different POW holder.
I hope you can make sense of my descriptions.