Wonder if anyone can identify this truck that's for the long-haul tender of a Mantua 2-8-0 kit I'm assembling?

[attach:fileid=/sites/model-railroad-hobbyist.com/files/users/check valve/E7476D0E-FD7B-4EAE-BC5F-EC9E0AA7FF3E(1).jpeg]

Comparing it with a photo of a Commonwealth 6-wheel, swing motion, straight equalizer truck (see below), I think it's probably a variation of that. The only difference seems to be the shape of the parts next to the pencil points. What think?

[attach:fileid=/sites/model-railroad-hobbyist.com/files/users/check valve/3BF138D7-61C5-4223-811D-E4D363A3A971_1_201_a.jpeg]