Blued chopper lump barrels respectively signed "HOLLAND & HOLLAND" and "98. NEW BOND STREET, LONDON", an engraved border on the breeches, and the smooth flat rib marked ".600 BORE, 3" CASE." with a raised matted quarter rib and matted front sight ramp. Rear sights comprise one standing and one folding leaf graduated for "100" and "200" yards, the front sights comprising a bead with flip over moon sight. The flats of the barrels struck with period London nitro proof marks. Substantial bolstered treble grip action, with removable firing pin discs, extended upper tang with manual safety with gold inlaid "SAFE", smooth gold double triggers, hand detachable side locks each with gold cocking indicator and signed "HOLLAND & HOLLAND", and marked "ROYAL MODEL" on the underside. The action and side locks are beautifully engraved in the classic English scroll typical of the Royal Model. Finely figured 14 7/8 inch walnut pistol grip stock with raised cheekpiece, checkered grip and forearm, case hardened grip cap with trap compartment, and leather wrapped recoil pad. The underside of the butt with vacant gold initial oval. The forearm with push button release and exposed parts of the iron engraved with the same English scroll. A pair of blued sling mounts complete the rifle. Weight 15 lbs. 10 oz. In brass cornered oak and black leather takedown case, with brass initial oval marked "W.J.F.", lined in green felt with period style Holland & Holland maker’s label on the inside of lid, the case containing a cleaning rod, snap caps, glass oil bottle, and various screwdrivers and brushes. The .600 Nitro Express was the largest commercially available hunting cartridge for almost a century, designed for the most dangerous of game throughout the world. However, because of the rifle's size and the cost of building them, Holland & Holland produced very few rifles in this formidable cartridge and famously produced the "Last .600 H&H" in the mid-70s before restarting very limited production in the 2000s.

Excellent with 98% of the original blue finish remaining on the barrels. The action retains 90% of the original case colors with some spotting on the upper tang. The blued top lever and trigger guard have some moderate wear of the finish from use. The wood is also excellent with sharp checkering and corners, and some light handling marks throughout. The leather covered pad is likely a period replacement with a small piece of filler wood in the heel and has a few small scratches at the heel and toe. This is a rare opportunity to own an absolutely fantastic Holland & Holland Royal Double Rifle from the golden era of English gun making in the largest caliber available at that time! Provenance: The Robert M. Lee Collection.