It is in the Gallery and I ensured that the lovely tin was included. The Op.00 itself was marked Stockholm! Early Optimus 00 (1920s?) Best Regards, Kerophile.
I was random surfing the net and came across an archive photo from 1910 showing Mr. Axel Elfström (CEO of Optimus) and company while on a sales business trip to Egypt. A trip to Egypt must have been mind blowing even for a CEO back then, and I wonder if this trip was the inspiration of the graphics of this beautiful tin design with pyramids and oasis.
The main reason I continue to log in to CCS is because of these sorts of discussions. Many thanks for posting Staffan!