Rare first pattern orange butterdish with convex shaped lid marked 3X/K

Rare variant first pattern butterdish or Fettbüchse with a high convexed lid. Not to be confused with the standard orange butterdishes which are common; this is the third time I see this variant with the other example being in my personal collection. both parts are nicely marked 3X/K and this example shows some overall traces of being used. I have 4 examples in unissued, similar condition, colour and variant. A rare opportunity to acquire this variant!