The first Jugs of the business were full bakelite and ribbed...
These 3 are the later models of Jug:
You're more likely to find a model 402 and 402E with the smallest size.
You're more likely to find a Model Bambi, a Model 102 and 104 with a middle size Jug.
As for the other larger coffee machines, it all depended on the amount of water you put in the coffee machine to get the right amount of required coffee.
For example: The Electro, The 305E, 306E, 105E, the 110E can be found with both sizes - middle and large.