A friend has been reading this thread and ask me to post the following.
"It's a small ring Mexican stocked in English walnut by Don Klein with metalwork by Don Klein and Herman Waldron. The engraving is by Dan Goodwin and is chambered for 7X57 Mauser with an 18 1/2" barrel. I had it built in the about 1984."

Nice! I especially like the shorter barrel and slimmer forestock.
One reason that the Mannlicher-Schoenauer carbines look so good is that they don't need a lot of wood ahead of the rear of the magazine since the rear face is the recoil surface; this means that the M-S forestock area can be made thinner and more tapered than most other bolt rifles without sacrificing necessary strength and so results in a dainty and petite rifle.
IMO a Swift needs a longer 24"-26" barrel (velocity) and a mannlicher-style stock needs a shorter 16.5"-20" barrel (aesthetics). JMO.
Regards, Joe