Stores reference 6D/1253. Size small. Green rubber facepiece for the type H oxygen mask. 1967 dated. These are in new old stock/unissued condition with original wrappings and labels. They do have some storage marks /soiling but are undamaged and completely flexible. Interestingly these were produced with no chamois fitted inside (see photographs). Three available, priced individually. Stock code O23829/30/31.