3rd Reich Luftschutz Volksgasmaske VM-40 Auer

In an used condition a volkgasmaske VM-40 Marked on the inside RL1-38/4 This stands for the Company Auer Type VM-37, VK-Karton, VM-Filter. Which is strange because the mask is a VM-40. The mask has various wear and tear in the rubber. Which is not abnormal after 80 years. Priced accordingly. The filter however is in perfect condition. Various WaffenAmt markings on the mask and filter. See photo's