Just a heads up for anyone who has one of these that they seem to be doing the most amazing prices on ebay at the minute so if you wanted to sell now might be the time.

There is a Nickel which is currently at 170 and a Hertel and Reuss that has just gone over the 100 mark.

​I'd guess the Nickel is worth 50 - 100 depending on exact condition so someone is doing well out of it.