another Charles Heyer in auction in Vienna https://auctions.springer-vienna.com/en/...p;currentpos=29

Bolt action rifle Mauser 98 Mauserwerke Oberndorf Chas. A. Heyer & Co Nairobi cal. 9.3 x 62 #104641 § C (E25)
1428
Lot: 1428
Bolt action rifle Mauser 98 Mauserwerke Oberndorf Chas. A. Heyer & Co Nairobi cal. 9.3 x 62 #104641 § C (E25)
Limit 600 EUR

Barrel length 70 cm, stock length 36 cm, year of manufacture unknown, German proof, condition 3. Barrel bore condition fair. Barrel engraved with "Specially made for Chas. A. Heyer & Co Nairobi", ramp front sight, express rear sight with adjustable rear sight blades (200m, 300m, 400m, 500m), integrated magazine (magazine flap stiff), claw mount with Wetzlar Tell 4x rifle scope (defective - break point in the lens), pressure point trigger, wing safety, German cheek piece, stock plate engraved "C". Rifle made for hunting in Africa.