HW80 safety catch will fit no problem but I think the 77/97, 95 & 85 are shorter.
Basically. Stock wise. A rounded underside to the beech stock, means a 'Standard' which were produced for the 35s full life span.
The walnut, squared of fore end was fitted to the 'Deluxe' model. Again produced until, Id
guess late 80's.
The walnut stock with the pronounced cheek piece and pistol grip cap is the 'Export' version - again produced throughout the 35s production run albeit with a shorter barrel in the modern version.
ATB
Ian