Original 75

[Graemevw]

On a bit of a whim, I've bought an original 75. I've wanted a spring target rifle for some time, this came up reasonably close so I bought it.
Not sure if I paid too much, but too late now anyway.

I know they can have piston seal issues and this one hadn't been shot in 20 years, but it's had maybe 20nshots though it and seems ok, putting out about 6ftlb so it seems ok for now at least.

I don't really know these though so have a couple of questions.
Is there a good online resource for these I need to binge read?

The questions i have right now are, the rear sight. Seems it has a wheel to loosen it so you can slide it back and fore. It's very tight and won't move. I don't know which was to turn it to loosen it so haven't put full effort into it yet though.
I assume it had a rubber buffer on the cocking lever? There is some sticky remains and there is now a mark on the action. Seems like it probably had a small buffer.
The barrel seems to be shrouded in plastic. Are they all like this?
I thinknive read that they changed thebpuston seal material at some point as they fall apart. Is that true? If so, when? If they did change, how can I date it to find out what seal this has?

It would be nice not to have to strip it but am prepared for the possibility the seals may break down at any time.

Thanks.

[Drew451]

The likelihood is that your 75 piston seals will have been replaced at some point as the originals would not have lasted. One of mine is a late T01 model and it required replacement. However, best keep any eye on things: if power drops off sharply or you start noticing debris emitting stop using it immediately.
If memory serves its the usual anti clockwise rotation to loosen the wheel. May just require a wee bit penetrating oil. There is a small serrated foot in the center that grips the sight rail.

At the rear of the cylinder, left side just above the line of the stock are 4 numerals giving the date in MM/YY, although this is sometimes absent from very late ones.

[thisisdonald]

I have an original 75 with a plastic shroud. Mine is scratched up a fair bit, but I reckon a few passes with different grade papers will bring it back to new.
Mine also has the buffer tou arevtalking about, although mine looks like hard plastic, that has sheared off.. maybe someone has attempted a replacement at some point. A rubber from a pencil would make a suitable replacement.

[Drew451]

I have an original 75 with a plastic shroud. Mine is scratched up a fair bit, but I reckon a few passes with different grade papers will bring it back to new.
Mine also has the buffer tou arevtalking about, although mine looks like hard plastic, that has sheared off.. maybe someone has attempted a replacement at some point. A rubber from a pencil would make a suitable replacement.

I've just had a careful prod about both my 75s and both have plastic shrouds. Only the short section towards the muzzle is metal, possibly phosphated steel or aluminium.
The earlier one has no buffer and there is marking on the cylinder opposite. The later one has a small o ring likely retrofitted and no marks.

[Graemevw]

I've just had a careful prod about both my 75s and both have plastic shrouds. Only the short section towards the muzzle is metal, possibly phosphated steel or aluminium.
The earlier one has no buffer and there is marking on the cylinder opposite. The later one has a small o ring likely retrofitted and no marks.

I just dug the remains of the buffer out of the arm, was deffinate clear and the hole it pushed into is deffinately factory. I'll see if I can find something that fits nicely. I put an elastic band round it for now.
I cleaned the action and there is a perfect circle of wear from the buffer and a tiny bit of extra wear from the arm. Nowhere near as bad as it looked in the picture I posted thankfully.

[cooper_dan]

The bit that looks like an o-ring squeezed out from the side cap should actually be a rubber bumper that slightly separates the stock from the action. Quite often they are missing

[Paul SE]

My Original 75, serial nr 023562, (01-80) did have a small clear rubber buffer on the side lever that left a witness mark on the cylinder.

[Graemevw]

My Original 75, serial nr 023562, (01-80) did have a small clear rubber buffer on the side lever that left a witness mark on the cylinder.

The remains look like they would have been clear.

[Graemevw]

Serial number is 023535, date is 01 80.
When were they produced from/till?

What are they worth?
This is in good condition, just a mark on the action where the buffer has gone and a few sort of rub dents in the stock if you look hard. Evidence of clamping on the bipod rail.
Other than that it looks very good indeed.
I paid £350.
I suspect that's about mid range? But it shot nicely and I'd have been waiting a while for a cheaper one I bet.

[Graemevw]

Thanks for the info.
I'll try and release the sight wheel.

So it seems some, but not all, had the buffer?
Do only some have plastic barrel shrouds?

If so, I'd imagine later models has those changes.

I'll go look for the numbers.

It may have had them replaced, I've no idea. I've not looked too close but the 2 screw on caps seem to have a bit of O ring sticking out, like they have been done up andnthe O ring has got pinched.
I assume they have O ring seals, I've not really looked closely. I assume though, that means it's probably been apart at some point. Only real reason if it has would be to Do the piston seals.

I'd post pics but it seems I'm not allowed. Maybe if I host them elsewhere.