Many manufacturers offered generic "battery pliers" with that profile. Here's a pic of some of my Blue Bird pliers, made by Bergman Tools. The one on the bottom looks like yours.
Nowadays, most battery pliers look like the second one from the top - which IMHO is the worst design. The third one from the top is by far the best design I've used.
If I may, I think the Blue Bird examples have too sharp an outside angle adjacent to the pivot. The ends of the handles have a very pronounced outward flare that has a familiar look. If I was compelled to venture a guess, I'd say contract Vlchek.
Joe is right - that's a model 11 battery plier, and the spring steel clip cleans and reshapes the battery post.
Here's my current collection of Blue Bird pliers and their battery carrier.
Joe is right - that's a model 11 battery plier, and the spring steel clip cleans and reshapes the battery post.
Here's my current collection of Blue Bird pliers and their battery carrier.