Back in early 1982 I accompanied my German dentist friend and a fellow dentist colleague of his on a trip to Ferlach in Austria to test out a 20G shotgun he was having made by Scheiring specially for slugs and to collect a single shot rifle that had been completed by Scheiring. In those days it was Helmut Scheiring-Dusel running the business. We spent time at his place and then accompanied him to the famous Ferlach gun range to try out the 20g and single shot rifle. I cannot recall what calibre the rifle was but later on my friend used a Scheiring single shot out here in South Westland NZ where I lived at the time hunting feral goat, chamois, tahr and red deer and it was in 6mm Remington.

Prior to heading out hunting when sighting in the rifle the L shaped extractor actuator screwed to the water-table broke off. Bit of a flawed design as the head of the recessed retainer screw was too large leaving very little metal on the foot of the actuator. I made a new actuator and used a smaller countersunk screw head making a much stronger actuator. By the end of my friends four or so weeks of hunting here in NZ he had broken the stock at the wrist on the 6mm. He did score quite a few animals with the 6mm although gut shot a large billy goat one day and shot and killed the same billy a week later, none the worst for the earlier muffed shot.

We spent a day and a couple of nights in Ferlach and headed up in the nearby Alps for an evening shot on chamois to try out his new single shot. My friend was accompanied by a guide while his colleague and I hung out at the hut that was in the area.
We visited a couple of other gunsmiths while in Ferlach, had a look at a 600NE in the white at one of them. Very interesting old shooting range with 100’s of years of history and of course a privilege to meet Helmut Scheiring-Dusel and see his operation.

After leaving Ferlach my friend said that Helmut had invited us to IWA ’82 which was in March that year. IWA is only for those in the trade or their invited guests. It turned out a bit of a laugh as when we got to the IWA trade fair in Nurnberg on the opening day my friends had forgotten their invitations and couldn’t contact Helmut Scheiring as he was already inside at the Ferlach stand. I had a NZ Gun Dealer’s Licence at the time so went and signed in as being in the trade and then invited my friends as my guests.

Unfortunately cannot help to shed any light on the OP’s original question