The WA,or might actually be a ST for White Gold which was an added mar at one time.
Three string bracelet by: Anonymous
Yes, the signature appears to be authentic..pearls are beautiful as is the shell with a large pearl on top with intricate minute marks. I will attempt to photograph the item.
Authentic Mikimoto Signature by: Anonymous
Do you think it is the authentic Mikimoto signature or a Mikimoto clam shell signature wannabee? They are around. If you search Mikimoto signature on this site you will find an example of an authentic Mikimoto signature, the M in a clam shell, so you can compare the two. This is the first and most important step.
Antique Jewelry Investor Support Team
Three strand mikimoto clam shell stamp by: Anonymous
Still wondering about the wa or wc on the back of the shell stamp. Any ideas?