Thanks for the explanation. If I'm being honest I always find it difficult to see any differences unless they're actually pointed out to me.
Ok, here we go with mine; the following are what I'd probably call my favourite crosses, the first one was bought in an antique shop in Germany, the shop owner said it had been sold to him by the family.
It has a square mark on the reverse and there appears to be letters inside the square - F ? maybe. There's something pencilled along the top which is too faint to read but possibly starts with Uffz. I've tried photographing the box from different angles and changing it to a negative but have had no joy in discovering the name, if anyone has an idea how I might be able to bring out the name in a photo please tell me.