I have a few Nemrod pneumatics in various stages of restoration... while the Galeons and Clippers were capable spearguns back in the day technology and modern materials have long overtaken them IMO.
Piston seals are no longer available, and they use a proprietary design so off-the-shelf hydraulic cup seals won't fit.
Nor will existing 13mm pneumatic seals from Mares, Cressi, Seac etc... I have tried for months to source them, and they cannot be CNC machined easily. The rear seal held pressure and did all the work and is usually much more worn than the front one... so swapping them over gives the gun a new lease of life.
The barrels are non-replaceable, and if too scored and leaking air the entire gun is turned into a wall-hanger.
Spear diameter is a heavy 9mm dia vs the usual 8mm these days meaning common replacement 17-4 PH stainless spear shafts cannot be used. Need to custom machine from 9mm stainless rod stock OR change the muzzle spear guide bush and probably the tail cap (which uses a proprietary Nemrod taper) if you want to use modern 8mm shafts.
The piston on the Galeons were at least made from stainless steel and not subject to as much galvanic corrosion as the cost-reduced plated steel one in the Clippers but still an issue after long years in storage up against an aluminium barrel and residual salt. This can lead to significant pitting and scoring in the barrel.
Line release system was very poor, relying on a moulded rubber 'finger' attached near the rear cap... only changed to the more conventional lever interlinked to the trigger on very late model Clippers.
Biggest issue of all is that they are all non-floaters on firing... not a problem when spearing fish on SCUBA was legal but in most countries now this is illegal... free diving only.
I tried to use a fully restored Nemrod Clipper in my usual dive spots only to find having it sink with each shot was EXTREMELY frustrating and time consuming to load. Used it once only.
I would advise to do what I have done... strip the gun, clean and stabilise any corrosion, reassemble and fill with 30ml synthetic fork oil and hang it on the wall as an interesting piece of diving history.
A Mares Sten 70 or 90cm is a vastly better gun to actually use, and due to lightweight modern materials will float on firing.
Spare parts (incl barrels!) are readily available worldwide.
Used ones come up on eBay regularly, but beware early model Stens (ribbed finger grooves on handgrip, crosswise safety) used a special bayonet fitting with o-ring for the pump which Mares changed to a M14 threaded screw in connector with o-ring still used currently.
Early pumps are unobtainium, and modern ones won't fit
Hope this helps...
