Swiss Miss - Who Is She??
The most obvious difference is everything I can find online about the K31 shows a weapon with a stock and barrel shroud that extends all the way to the front sight, and as you can see from the two pix above, Swiss Miss has a short fore-stock and no shroud.
The next thing is everything I can find on the K31 shows a "Cocking Ring" that also acts as a safety when rotated. As you can see in the above pic, there is no ring and a thumb safety switch instead.
All the K31 info I can find shows a straight bolt handle, but Swiss Miss has a bent handle, I don't know if this O.E.M. or from a previous owner.
From it's inception in 1889, the Schmidt-Rubin straight pull rifles were chambered in a variety of calibers ranging from 6.5mm to 8mm, but most were chambered for the Swiss 7.5mm round. Swiss Miss has "CAL .308 WIN" stamped in the base of the sight, if you look close you can see it in the pic above.
That's pretty much all the high-points of the differences, and except for a reference in an article about a non-functioning website for a dealer named Mandall Shooting Supplies in AZ. about .308 WIN K31's going for $1000 that's all I know about this rifle. That, and I know she's a shooter because my uncle never failed to bring home a deer every time he took her to the field.
If you can offer more info on this, I'd appreciate it. If you have any questions to clarify something about her, feel free to ask, and I'll try to answer them to the best of my ability.
And before anybody asks, like the F-N Browning Auto-5 I inherited, serial ##'d in the 80,xxx range (made somewhere between 1903 and 1939, exact records are not available), she's not for sale. It's that whole Family Heirloom thing...