SA 25.5 – Norway – Registered covers

Salvation Army centenary in Norway 1988, commemorated on Norsk FDC Service cachet. These are registered covers with local PM (Kristiansand). Very unusual. Seems to be issued in a limited edition. I have not seen these before, but due to the number on the cover, they seem to have been issued in at least 3000 ex.

SA 25.5 - Norsk FDC - Local PM!!!
SA 25.5 - Norsk FDC - Local PM!!!