Mikimoto Clasp

Hello - My friend's Mikimoto pearl necklace was purchased in the 1990's and was recently stolen and sold to a local jewelry store.

We found the pearl strand at the jewelry store and we know that it is the necklace because the person who took them, told us where he took them.

I know the clasps have changed over the years - her clasp had the kind of figure 8 shape with the small pearl in the center in 14 kt gold. The store told some story about how the strand they had was purchased some 60 years ago and were her mother's pearls she was trying to sell. I believe the clasp was different back then, in maybe sterling instead of gold and a different shape.

Do you happen to know what the Mikimoto clasp might have looked like that long ago on a 5-6mm single stand of pearls? Thanks for any help on this.