I have seen a few of them in the past 20-25 years, also i had a few for restoration in the shop.
Yes, it is easy to fix the backpart in "index", apart if it is 162, 6 degrees, 180,56 or anything between.
I know Wacker, i know his auctions, there is nothing more to say about him, ore in other way- i dont want to loose an word about him.
But i am still at it- it is one of the best conditions i have seen the last years.