Hyvä Suomi, folks. "Skiing Finn" was a brand created by Tampere-based shoemaker Aaltosen Tehtaat Oy. The boots were heavily marketed in North America using materials such as the poster you see showing happy Finns out for a day of skiing (poster not included in sale).
These boots are from the mid-1970s and are standard 75mm with 3-pin holes, but because of the rubber sole you could use them for 4-pin as well, which was common in Finland until the end of the 75mm era. The boots also have the heel groove for cable-type bindings if that's your jam.
These are not the most expensive boots we've ever sold, but they will get the job done. Most of that spray-on crap that was used as a waterproof coating has been scrubbed off the cuffs. There is still some left on the tongues but that seems to be in place.
