After watching online auctions for almost two years now, I've only found two collections of these little oval beads. These were strung on tigertail with a Taiwan cloisonne barrel clasp, so I felt no compunction in disassembling it and matching up the beads.

They're small - about 10.5 x 8.5mm

A different set of small ovals are still intact in a necklace of matching tigereye ovals, which can be seen here:
http://2.bp.blogspot.com/-v9x_jSgk7O4/U_9iytrL61I/AAAAAAAAJcM/tUgdLVhKWiQ/s1600/ChineseSilverClasps%2B004.jpg

Frederick - were these the type of beads you were selling in the early 1970s?