Please help with Tiffany pattern

[mwb]

Hello. I have been looking everywhere trying to ID this Pattern. I've been to two public libraries and spent hours online. I have 2 serving spoons, and 6 small spoons with this pattern. They were made by John Polhamus based on the mark. So, They're pre 1874, and probably pre 1868, the year Tiffany started in-house. This spoon is almost 8 inches long.

So, these are my best guesses. Anyone know?