Up for auction is a vintage 1954 AAA Race Mechanician Lapel Pin - Indy Indianapolis 500 - LGB 1/10K GF. This is an estate sale find. Other similar pin examples refer to the Indianapolis 500. Not an expert in this area. I’m not knowledgeable enough to know one way or another. Please review pictures regarding condition and additional information.
Note - I put a reference to the GF meaning below.
- GF: A” GF” mark stands for “gold-filled.” Gold-filled jewelry has a thicker layer of gold (at least 5%) than GP jewelry and is more durable and hypoallergenic. Common markings include the karat number and GF, or a fraction followed by the karat and GF. Example: “10K GF” or "1/20 10K GF" (1/20 means that 5% of the gold is 10 karats)