Vintage 14K Gold-Filled Four Leaf Clover Tie Clip by Kreisler Quality, U.S.A.

Description

Up for purchase is this Black & Gold Clover Tie Clasp from Kreisler Quality, U.S.A.  I noted that there's another seller offering the matching cuff links, and that seller dated them to the '60s. Perhaps that's the case for this piece, but I haven't seen any direct evidence on the web like an advertisement to say with certainty.
Either way, this piece is classic black on gold, and that four-leaf clover is an individual element attached on top, slightly raised above the flat surface. Both the enamel and the gold surfaces show modest wear, though do note neither have been polished, so improvements are possible.
The back of the front portion of this clip is inscribed:
14K Shield-ORNM
And the very back of the clip is inscribed:
Kreisler Quality USA
1/20-12 KT GF
Finally, the clip measures:
2-5/8" long x 7/16" wide and varying from 1/4" to 5/8" deep
If you have additional questions about this tie accessory, please ask, but I think that covers it. Thanks for looking!