VTNa/C 250W (Tež Tesla (tt))

Hello to everyone. I got this rare bulb today. It is high pressure natrium (sodium) lamp made in Yugoslavia, in NOS shape. Arctube is clear, logo is still visible but the box state is rump, because it was sitting in garage. I got also 2 Philips (250W and 400W) lamps with boxes for 250W lamps. I am quite amazed to find it because these are rare nowadays and also many are EOL or rusted/with worn out logo. C means tubular, tubular bulbs were only clear.