Antique Vintage 1920 Delegate Badge for 20th Annual Convention Building Trade State of California, order Free Shipping, K1

Metal 1920 delegate badge for the 20th Annual Convention Building Trade, State of California, Bakersfield.
Calif. State Seal, Oil Rig, Cornucopia of Flowers, Vegetables , Animal with Bakersfield.
All order three pieces have maker's mark on back. I just can't make it out.
See all photos for condition, feel free to ask questions before purchase.