Your pistol was testfired and proofed in Prague Proofhouse on order Lovena Gunmakers Cooperative. The number 300 is correct. Exact date I can not say, pistols were testfired in many batches for a whole year.
The Lovena cooperative was founded 1920 by 10 famous gunmakers: A. Machac, V. Novotny, B. Rosicky, J. Javurek, N. Lesak, J. Vacha, J. Ruta, O. Zubik, J. Kozler a J. Hynek. Lovena cooperative is still in bussines. Today Lovena produces cheap Air pistols and industry springs. Gunsmithing terminated 1995. On very primitive company webpage http://lovena.vyrobce.cz/ is shown original company logo in green.
The word Lovena is writen with hook over the letter e and pronnouced Lo-vie-nah. The Czech word Lov means hunting. Lovena had some subsidiaries around the Czech republic, in Plzen (Pilsen, town where I was born and still live) too.
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