Two Air Ministry Issued Whistles Archive as evidenced by the accompanying

as evidenced by the accompanying Caterpillar Club letter

Dolphin at Gosport

with numerous interruptions and holes in the fabric

oxidation spot on the obverse)

cover printed in brown and gold inks on a thick beige stock

Two Air Ministry Issued Whistles Archive as evidenced by the accompanyingTwo Air Ministry Issued Whistles The first whistle is fabricated from a nickel plated brass alloy, with a shaped mouthpiece and two distinct chambers for passage of air to exit on either side, plus a ring on the opposite end for attachment to the accompanying chain, marked with the Royal Crown above "A. M." (Air Ministry), "293 W 102" and maker marked "J. HUDSON & Co BIRMINGHAM" on the cylindrical shaft, measuring 18 mm x 82. 2 mm. Second whistle is