This is the excellent Cll, it is a .21 caliber roundball or pellet multi pump pneumatic airgun. They made both proprietary .21 ammo both roundball and pellets. Roundball ammo is rare and hard to find
The .21 pellets are non existent or vary very rare. However Swedish Excellent Airguns was not the only company to use proprietary ammo or a .21 caliber.
Today we examine and backporch plink at 30 feet with a piece of airgun history.
There were several models made. some with smooth bore and rifling in the last few inches of the barrel others are fully rifled. They offered both full size and carbine. A K signified carbine.
Their first airgun was patented in 1904, 1908 they patented a CO2 airgun. They also made an odd top lever spring-piston rifle for a brief time in the early 1920s, as well as a triggerguard-lever rifle.
They also made three versions of breakbarrel springers. The first one was made from 1933 to 1949 and the second and third were more robust guns made from 1949-1959.
Their pre WWII production is estimated at 8,000 rifles. They actually made 3500 rifles during the war, from 1943 – 1945. From 1945-1970 they produced as many as 25,000 rifles.