All very interesting. I had a thread here a year or so ago to ascertain the existence of the 'Magnum' but I cannot recall what this term actually designated.

I think some 335s were for the German market and therefore sub 6ft/lb.

Anyway, Baz, any idea what yours is performing at and any idea what yours is performing at duomatic? I ask because between you, it seems you have a Mk1 and a Mk2, the former also being a magnum.

It also seems that, in addition to the barrel release (Mk1 pull forward and Mk2 at an angle per Baz's photo), the Mk2 has a different rear sight which is governed by the circular screw (see Baz's photo). The Mk1 seems to have a sliding sight.

Rgds
A