Does anyone recognize maker of this 1 1/4 inch engineer wrench?

[cgw2also]

 Newbie Charlie here, would like information on this wrench, only markings are 607 on one side & what looks like a letter or number within  a diamond or square set on end on the other side. Wrench is 8 1/2 inches long and 1/4 inch thick with a plain steel finish. It has grind marks on the flats on both sides and a slightly oval shape to the shank, causing the wear to the 0 & the logo. The closest I could find on AA was an Armstrong 607-A but this wrench has no markings on the flats as that one did and it was 1 1/8 inches. TIA for your help.

Charlie

[bill300d]

607 is an industry standard number for that type and size wrench.
The diamond mark looks to have an H in side it which would make it from the Herbrand Co.

[cgw2also]

 Thanks very much for your spot on answer bill300d.  I was looking for a B or an 8 answer and completely over looked the H in a diamond.

Still Newbie Charlie