Rare complete container for the Gasanzeiger marked bwz

Rare metal container for the gas detection cartridges for the Gasanzeiger. Nicely maker marked bwz indicating production by Auer. The case comes with its 5 clips with 5 tubes. These tubes were used with the Gasanzeiger to test for toxic gasses. This is the first time I find the kit this complete; I have had empty boxes before but never with the clips intact.

NOTE: I can send these tubes outside of the European Union but it would be at your own risk.