I have an unused Optinus 00 i this carton: The pump has rubber O-ring, not leather. Anyone who knows the period of production? The 80s?
Mid- 1980s Optimus Catalogue: https://classiccampstoves.com/threads/optimus-stove-catalogue-mid-1980s.42490/ Best Regards, Kerophile.
I reckon mid-1990s for the last Op.00 produced by Optimus: Optimus No.00L "Camper". Made in Sweden, Early 1990's. Un-used. Best Regards, Kerophile.