MAKERS MARK-ANTIQUE DECO PIN WITH SMALL RUBY AND PEARLS

by lg Rasor
(haslett, mi)

COULD YOU IDENTIFY THIS? On the back side under the actual pin itself. Yellow gold maybe?

WHC D(appears to be a "D" with some(3)demarcations 9 375 G.

So it looks like:

WHC D 9 375 G

Ideas?

Thanks