Alfred,
Yes, it is a J�¤ger. It is a first variation (one-pin) serial number 4109. It has a correct but mismatched magazine with the little takedown spur. It is a commercial model without Imperial acceptance marks (only 18 have been reported with military acceptance marking). If you go by the highest serial number reported, there were approximately 13,000 produced, but to date only 78 have been reported. So, if you have a J�¤ger, blued or unblued, you are very fortunate.
I would like to add the serial number of your J�¤ger to the database if you would be so kind. I would also like to know if it is a one-pin or two-pin variation and if it bears Imperial acceptance marking. Thank you.
Ron