Rare Sekiden Pellet Gun

I loved these as a kid and now, like everyone else, I'm re-living my childhood through my collections.
Sekiden pellet guns were made in Japan and imported to Europe and the USA in the 1960s and 1970s. The pellets were small made of clay. But when they ran out we'd buy small peas and use them!
This is the latest Sekiden I found. Complete in the package, albeit a little worn. The gun itself is in 100% mint condition. The big deal here is the cap firing mechanism. Most Sekidens didn't have that feature. The third picture is a basic Sekiden without the cap feature. Also a little rare as it's in gold instead of the usual black.