United States. A Type B Air Force B-17 B-24 B-29 Intervalometer visually-hidden The Battalion was raised in

The Battalion was raised in eastern Ontario with mobilization headquarters at Camp Valcartier

both on a metal ribbon bar with a horizontal pinback

while aboard the HM Submarine E13

(1871-1957)

United States. A Type B Air Force B-17 B-24 B-29 Intervalometer visually-hidden The Battalion was raised inManufactured by J. P. Seeburh Corp of Chicago, IL, a Control, Bomb Release, Type B otherwise referred to as a intervalometer, used by US Army Air Forces bombardiers on B 17 and B 29 aircraft to control the spacing interval and number of bombs dropped per train to execute precise bombing patterns, measuring 24 cm (l) x 9 cm (h), near very fine.