This is a rare, landscape-oriented, and uniquely attributed Platinum bar from Engelhard.
Obverse reads "ONE TROY OUNCE" above ".999+ PURE PLATINUM" followed by a unique 5-digit serial number. The bottom displays Engelhard's bold logo with "MINERALS & CHEMICALS CORPORATION" written below.
Reverse has a circular emblem for USSC. Beside it the bar reads "PRODUCED FOR AND MARKETED BY: UNITED STATES SILVER CORP. VAN NUYS, CALIF."