Before the first World War, Holland & Holland was using Mauser 98 actions. From 1919-1957, they gave you an option of having your rifle built with either the Mauser 98 action or the Pattern 14 Enfield action. From 1957-1981, they were using whatever salvaged military surplus Mauser 98 action which they could get their hands on. Sometimes out of sheer desperation, they would resort to building rifles on Mauser 66 actions (I have seen 2 such specimens over the years, both in .458 Winchester Magnum). From 1982 onwards, they started using various Mauser Model 98 actions depending upon who was supplying them at the time (like FHZ or Waffen Prechtll).
View attachment 538080
This is from their 1958 catalog. Observe the red note on the top righthand corner, which informs the customer that Holland & Holland has already run out of Pattern 14 Enfield actions to build their magazine rifles on, by 1957.
That is very interesting. I was first in the Holland & Holland factory in the early ‘90’s. The wood room was enough to make you salivate. With regard to bolt action actions, they had crates of vintage ‘98 actions waiting for builds. At their rate I production, I suspect that they are still working their way through those crates.