I did find a card that small. But the boxes with 900 and 955 had 10 years of old cards dumped. So indeed it may have been the 2MB ones that were the standard for those two bodies. I even had a pack of filters for those two bodies. Those filters were around 1" wide. Talk about a small CPL
I can remember when the 955 was the neatest thing since sliced bread. Then again I can remember using my parent's Brownie box camera as a kid. Funny that the Brownie is on the shelf in the living room, while the Nikons are with the grand nieces.