It might be of interest to the forum that M. Z., I presume it's the same M., was very well known here in Sweden during the 70s and onwards as a fly tier and contributor to
Fiskejournalen (Fishing Journal), a monthly magazine seated in Gothenburg, where he also worked for the legendary (and I may say prestigious) shop Strömvalls sportfiske.
The first item I bought there, early 70s, was a spare grip for a Mitchell 300, inherited after my mothers younger brother.
He, and the owner and other staff, where always welcoming and kind even to us younger fishermen who then couldn't afford the top stuff.
The last talk I had with him was in the shop, a short time before his retirement, which is the topic of the linked article.
https://www.fiskejournalen.se/mac-zims-gar-i-pension/All the best!
Btw, the first fly rod I fished was a brothers "Two Lakes", it helped me land my first Sea Trout on fly about this time of the year, 40 years ago...now the season starts April 1th.
Addendum: IIRC the blandness and matte finish is intentional, the colour is called Grey Heron, thus invisible to the fish.