I've had this Puma Nicker in my collection for many years, because of the serial number, I just assumed it was made in 1974. However, I've just found this Puma knife dating chart and it seems my knife was made in October 1971.
Here is the chart and a few pictures of the knife and sheath. It appears to be unused as it's in wonderful condition. With a lovely little swedge and some subtle serrations. It even has its original green sheath.
Why not add pictures of your Puma knives and date them.