A USSR stamp, 1983. Gas main <a href="https://en.wikipedia.org/wiki/Novy_Urengoy" class="extiw" title="en:Novy Urengoy">Urengoy</a>–<a href="https://en.wikipedia.org/wiki/Uzhhorod" class="extiw" title="en:Uzhhorod">Uzhhorod</a>.
Scanned and processed by <a href="//commons.wikimedia.org/wiki/User:Mariluna" title="User:Mariluna">Mariluna</a>
Personal collection