Back to this one....same receiver as the Tradex one. This is the same bolt the M61 uses. The M61 is different design then the M24 series.
https://www.naturabuy.fr/carabine-Match-22lr-SCHULTZ-LARSEN-DANEMARK-MK38KK-item-3510110.html
Lineage of the M61 here
http://forums.gunboards.com/showthr...Larsen-Model-61-22RF-Target-Rifle#/topics/872
M61/62 brochure
https://www.google.ca/url?sa=t&sour...FjABegQIBBAB&usg=AOvVaw2mkhN_PCAmXj5BGoZ4cJfh
So whatever the Tradex one is, it is a later version of the M61 series.
Regarding the "mystery barreled action" here is some further information. Schultz and Larsen literature identifies a UIT Standard Rifle without specifying a model number that appears to use the same barreled action. That's not to say that it doesn't have a model number and it may in fact be a M71.
To confuse matters further, the same barreled action was made in a free rifle that is very much like the M61. Unlike the M61 which has a double set trigger, the free rifle with the same barreled action has a two stage trigger, a longer receiver and bolt, and dovetail grooves on which a diopter sight can be mounted. This rifle weighs about 14 lbs.
