According to Krause edition 2008 and according to Numismaster, this coin has a diameter of 21 mm and weighs 4.5 g. My piece however is 23.98 mm (±24 mm) and weighs 6.0 g. I don't have any other similar coins to look at, so I have to turn me towards this forum. Can any one check this piece in his/her collection and let me know their findings. Kind regards, Jupke
Krause is wrong. My 1974: 5.9g, ~24mm. The spec change was in 1978(km36), but KM used that data for the earlier issues(km15,9,3).