NOMENCLATURE: Grenade .303 in Short Rifle, No.3 and 3A
SERVICE: Land, Naval
DESIGN/PATTERN NO: C.I.W. 2164
TYPE: Rifle, Rodded, Percussion
FILLED WEIGHT: 1 lb 5 ozs without rod
EXPLOSIVE CONTENT AND WT OF EXPLOSIVE: 2 ounces 2 1/2 drs
TROTYL in two pellets
PRINCIPAL DESIGN FEATURES: Segegmented steel body with brass case, which carries a brass vane and setback collar. Safety pin passed through collar. Base fitted with a spring clip to grip nose cap of rifle and is threaded to take a 10 inch rod. Range 200 yrds.
MARKING: Red filling ring; Pink band to denote Ammonal or Green to denote Amatol or Trotyl
Mk 1 introduced 16 Feb 1915 Previously known as the "J" Pattern Military Grenade .Obsolete 11/12/22
Mk 1* Without spring clip, Land Service only .Obsolete 11/12/22
Mk 2 introduced 31 July 1915 Body more tapered to permit better airflow to vane. Central tube sealed by rubber Washer. Filled with AMMONAL,or AMATOL 80/20 .Obsolete 11/12/22
Mk 2* 3 introduced Unknown .There are obscure references to these markes, but no details are known.Obsolete 11/12/22
Mk 3A MK1 Modified pattern to improve airflow over vanes ‑ square base. Filled with two 2 ounce pellets of TONITE.Obsolete 11/12/22
Mk 1* Without spring clip. Land Service only.Obsolete 11/12/22
Mk 2 Without spring clip; rounded base.Obsolete 11/12/22
NOTE The above information is from an unknown source and i do not know how reliable the information is especially with the repeated MKs so please just use as a rough guideline
spotter
The following is from "an introduction to british grenades" by I.D Skennerton
Mk1 10in rod,spring clip at base for SMLE rifle nosecap
Mk1* No spring clip ,land service only
Mk2 More tapered body for better airflow to vanes,Rubber washer seal
Mk2*&3 spring clips removed
No3A-
Mk1 Like no3 mk2 Tonite filling,Trotyl or amatol 40/60 for Naval
Mk1* No spring clip ,land service only
Mk2 Same as no3A Mk1* but new manufacture and different striker