Dr Pepper Machine model progression

[Kaleid20]

Can anyone help me out and either share with me model numbers or a series of pictures on the progression of what Dr Pepper machines looked like. The vast majority Ive seen available are the square top ones I believe to be from the 60's & 70's. What were the models pre-1960?? Is the VMC 81 the only model before 1960? Any one who can provide reference would be appreciated.

[Eric]

Selectivend 96 rounded top.. non-embossed, VMC 33, 81, 110 again non-embossed, Idela 55, 85 slider type cooler/machines non-embossed
older coolers like the Quikold junior, standard and masters were embossed in both script type logo and brick logo.
I'm sure some other can add more.

[collecture]

Atlas, Bevco, Guiberson did a lot of the chest coolers.
The SelectiVend's (S-48 & S-96) are the more commonly seen uprights, but there exists Vendorlator 33, 81, 88, 6CV, 110, 144M, 144SA & the VMC 302 according to Walters. They are really not very common machines in any make or model.