Anyone have this PH4 rear aperture piece and lenses?

[Strangely Brown]

Stewards at Bisley is generally open for the main meetings only these days; now run by Simon Goldsmith who has recently joined Norville opticians practice in Bristol.
Simon still caters for people wanting prescription eyepieces for early rear sights, or that was what he told me a couple of years ago!

https://www.norville-keynsham.co.uk/simongoldsmith

[Surpmil]

Is this "Stewards" you mention a successor to J.H. Steward? I thought the family closed that firm down finally in the 1970s?

[Alan de Enfield]

Is this "Stewards" you mention a successor to J.H. Steward? I thought the family closed that firm down finally in the 1970s?

From an earlier post :

James Henry Steward established J H Steward Ltd in 1852. With his first opticians practice located on The Strand, he gained a reputation as a skilled manufacturer of optical, scientific, and nautical instruments. Steward quickly became the primary optician to the Government, the National Rifle Association, and the National Artillery Association. The business remained in the family until 1972 when the founder’s great grandson finally decided to pass on the mantle.

A long-standing employee approached his niece, Elizabeth Goldsmith and her husband Simon, who then took over both the business and a century-old commitment to helping shooters reach their full potential.

J.H. STEWARD (BISLEY) RENAMED
Today we continue to attend National Rifle Association meetings and hold a permanent trading location with eye testing facilities at Bisley Shooting Ground, Brookwood (home to the NRA). See our calendar of shooting meets here. J.H. Steward (Bisley) Ltd now serves shooters from around the world under the new name of JHS Eyewear.

[Rick]

That's J.H. Steward of Bristol https://jhs-eyewear.com/pages/jh-steward-bisley

You're probably correct; I remembered reading references to Sweet doing that, but he lived and competed in Australia, a bit of a ways from Bisley. They may be well worth contacting, just for information purposes. Thank you!

I seldom come across one of these with the lens still in but I've got one of the coloured filters which is about .411"

That diameter is very helpful; thickness of the filter?

I'm not at home where my rifle and equipment are, but I wonder if the eyepiece screws down to put pressure on and clamp the filter, or whether it is threaded so that it runs out of thread and stops at the point where it is just touching the filter. Tightening the threaded piece down tightly on a lens seems like an invitation to over-tighten and crack or break the lens.

I should be able to get a small tipped 90 degree probe in the opening and feel if there's a gap remaining after the eyepiece is screwed all the way in.

In the references I saw to the filters I never saw any mention of offering diopter lenses. James Sweet as best I know only offered diopter corrective lenses for front sights.

---------- Post added at 03:09 PM ---------- Previous post was at 03:03 PM ----------

Hi Alan, that seems to be the most common edition seen on websites and referenced. I think the latest/last one offered for sale (when available for purchase) is the 7th edition. A while ago somebody who has that version mentioned online that the focus has moved on to the more current fullbore rifles, kind of skipping over the No. 4 rifle.

Presumably, somewhere within the 4th to 6th edition, Sweet would have put more focus on the No. 4 in the chapters addressing the rifle itself.

And that is a very cool rear aperture that you showed us pictures of!