I'm not at all surprised at all the glowing praise and love for this lovely break barrel.
Back in 1977, with the advent of Airgun World and a new Age of Enlightenment, many of us were introduced to the "exotic" German rifles. And the 335 was, most definitely, one of them. Highly regarded and sought after.
A fair few people would, seemingly, sometimes use the barrels from these grafted onto more "powerful" rifles, such was the reputation.
Anyone remember Jim Tyler's (WBPS) Marauder?