Hi Dan, I've got a very similar rifle to yours. Mine is the ZV3, which my dad bought for me when I was 11 (in 1958!). It's smaller than the one you have, and if you look on www.vzduchovka.cz, you'll find loads of Czech guns. As to the monetary value, I don't think many people collect these, so it won't be high. Maybe £60 as already suggested, even though I've never seen an example of yours or mine for sale. However, to you and me, a value can't be placed on it. Hope this helps.