I did find that Joseph Mayer and Bros. were eventually taken over by E.J. Towle Mfg. Co. but the mark for E. J. Towle Mfg. Co has the E to the right T in the middle and J on the left of the crossed pickaxe and shovel.
The marking on this spoon shows a J on the right F or E in the middle and a T on the right.



Any ideas of who this might be or if it is a variation mark for E.J. Towle Mfg. Co.