My current O.S. inventory: (from memory)
.15LA
.15CVA
,29 U/C engine, 1950's vintage
.32SX (x6)
.46SF (x2)
.46FX (x2)
.61SF
.77VRDF
Got my first OS engine in the mid-70's when I was still flying U/C. Here's a pic from last weekend. three .32SX's, two planes.