There is a No.4 Mk.1* for sale on a well-known gun auction website, with a windage adjustable Parker Hale micrometer with an adjustable diopter (NOT the PH5C kind, I hasten to add), and the front sight is a Parker Hale globe, going for about $350 at the moment, but I don't think my wife would let me go for that unless my Long Branch went bye bye too (sob)