22C/1350 (Mk.3)

Frankenstein & Sons 22c/1350 "Waistcoat, Life Jacket, Aircrew, Mk. 3"

The life vest inflating bladder markings; date of manufacture,  September 1961.

According to the handmade writings, this particular life vest, supposedly during a period of its "service life", was assigned to the RAF 20 MU (Maintenance Unit) of Aston Down.