Carriage of artillery equipment by air : Gun, machine, polsten 20 mm Mark 1 on mounting universal 20 mm gun no. 2, Mark 1 in … training regulations Weapons / War Department : Browning machine gun, caliber .30, model of 1917 / War Department Coast artillery drills. Vol. III : Gun drill-B.L. 6-inch : marks VII and VII* : guns on mark V mounting (Land Service) Coast artillery drills. Vol. III : Gun drill - Q.F. 6-pr. 10 cwt : gun on mark I mounting (Land Service) Small arms training : Mechanical subjects / War Office. Army Council. Vol. I. Pamphlet no. 7: .303-inch machine gun - Engeland Voorschrift, 26/GS Publications/628 Small arms training : .303-ich Lewis Machine-Gun / War Office. Army Council. Vol. I Small arms training : Training / War Office. Army Council. Vol. I. Pamphlet no. 7: .303-inch machine gun Royal armoured corps : weapons : 75-mm gun (M.2 and M.3) Royal armoured corps : weapons : Heavy machine gun (besa 15-mm, mark I) Royal armoured corps : weapons : Ordnance Q.F. and S.A. 6-Pr. gun Equipment scales : For guns, machine, Bren .303-inch, Mks. I and II : issued by technical scale and S.R. section, M.G.O. branch, G.H.Q (I) training regulations Weapons / War Department : 37-MM. gun and tank cradle, M1916 / War Department