Hi Katana,
Great to hear that you are now my senior
Yes !! your gun need bluing. And you are very fortunate to have such forefathers, who kept the things for you. I am sure you must be feeling proud.
I know good gun smiths, they are extinct spices now, still I know one, but really painful to get work done by them as they are not in hunger of money but finds who can appraise their work of art and there I stand far ahead of any one in the vicinity and pay well over their expectations, so they fetch their jewel for me (may be a junk for others)

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This particular was lying for long in a corner and my inquiry to his shop, up and down the godown (which he never mind due to my relationship, you can understand today's scenarios in the country, especially in a gun smith premises). I found it and he agreed to gift it to me, I hope by next week, I can share the younger brother of your air rifle in beauty.
By the way another one Diana 35 is in bluing (East German) , I will soon share that too.
Thanks for sharing the senior.
Regards