Company Name: A & W Smelters and Refiners. Commonly referred to as Alexander Westerfall but the “A” and “W” were Alexander and Westerfeld, two presidents of the company.
Company Location: Mojave, CA
Company Information: Commonly called the “Aztec Sun” hallmark. The company started operation in 1963. The silver to produce these ingots was sourced from the Silver Queen Mine in Mojave. The corporation was dissolved in 2005 (mentions Alexander).
In 1993, the company was charged with hazardous dumping (mentions Westerfeld): lawsuit.png (article)
Known sizes: Odd weights from ~1 to ~5 oz, ~10, ~20, 100
Advertisement from The Los Angeles Times, January 24, 1969:
Gallery:
| Obverse | Reverse | Additional | Description |
|---|---|---|---|
 |  |  | 1.48oz example displaying possible fiberglass woven glove imprints from handling while partially molten |
 |  |  | rounded ~5 oz example |
| square ~5 oz example | |||
 |  |  | 11.94oz example, rectangular/trapezoidal mold |
| 20 oz | |||
| 100 oz |