RARE 3 Zip 30-06 chamber cartridge adapters + box with blanks & projectiles

Description

Zip adapters were made in San Fransisco California for a short time, I don't know the time frame. They unscrewed/separated used a 22 blank with a Zip made bullet for the original caliber . Box says 30-30, 30-06, 30-40 crag, 300 savage, 303 savage. The bullet and blanks were all interchangeable with these cartridges.
The 3 zip 30-06 adapters included are all different in their nomenclature and knurled design or lack of it. All different but the same cartridge.
RARE 3 Zip 30-06 chamber cartridge adapters + box with blanks & projectiles