The A.F.0210. strap was introduced by the MoD for military watches and compasses in 1945, with a stores description A6/AF0210 : STRAP, WRIST, INSTRUMENT, quickly shortened to the AF0210 strap.
The A.F.0210. strap was part of the light weight 1944 pattern (44 pattern) webbing introduced by the MoD in 1945 to overcome the shortcomings of the earlier 37 pattern webbing. This new webbing was designed initially for General Service, but it was introduced as Jungle Warfare Equipment