I need somebody who knows something about Swiss 20F gold pieces. I currently have 2 1937 gold 20F coins on Ebay that are up for auction which I had expected to get about $90 each for. Somebody just emailed me to ask if I was sure of the date on the coin because they didnt mint any 20F gold in 1937. I checked the date on the coins and sure enough they were dated 1937 with a B mint mark. However, I also checked and saw that NGC hadnt authenticated any 1937 swiss 20F pieces. Furthermore, according to the swissmint website, they didnt strike any 20F gold pieces in 1937. Anybody have ANY clue whats going on with these two coins?