Interesting, I have a lifter that started life as a 12ga 32" grade 2, and now is a double rifle, 44-40 the barrels were sleeved by somebody do not know who, but the BWT is around 1/4" gun weighs north of 12 lbs the barrels have leaf sites and sling swivels on stock and barrels, I believe the only way to be accurate is to use a tripod, Thought it may have been done by the Meriden Rifle Co, they sleeved a couple of Parkers and brought them to Parker outings back when for them to see, but have no records of this letter just says grade 2 12ga, It is a interesting gun though, Gary

Paradox guns from Holland & Holland
 

Here's a little information on real Paradox guns. And then here's one for sale on GI.

https://www.gunsinternational.com/gu...n_id=101596545
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that's a interesting post...charlie

A friend had a 1889 Remington 10 bore that was stamped on the lug 12-00, where you would see the shot numbers, which we both thought meant 12 double-ought buckshot. He used it as a turkey gun and did quite well with it shooting regular size shot.

Paradox 28 gauge
 

Just as a follow up, there is one of the few H&H 28 gauges coming up at the Rock Island May auction.
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I really regret not bidding aggressively enough on the 28 gauge Purdey paradox a couple of years ago.