I would guess it's in the ballpark of 1980 but could be from a fair amount of time after that. 6 ply shells so it wouldn't be any older than roughly 1978ish but could be Monroe era too. Not sure how such a drum would have had a rail applied in that location. Possibly if it were a very early 6 ply and someone special ordered a rail in that position...however the spacers under the floor tom leg brackets are a much later thing. The "129" stamp inside the drum might be of some significance (Dec 1999?) but I'm not sure.

The claws on the bass drum are generic replacements.

Kind of tough to really narrow this down with the information available.

The large curved spurs are currently available but they were dropped for quite a long period. I don't recall when that occurred but that would probably be the latest year the set could date from.

Thanks for sharing your thought K.O

My initial thoughts was around 1980 too, possibly even a Rocker Kit, I seem to recall seeing an early one that had the curved spurs but I may be mistaken. However, this 22" kick drum features 10 lugs whereas I thought the Rocker kit had only 8?

Regarding the location of the rail, yes typically you would expect these to be off-centre unlike the holes that are clearly seen in the photos that I provided but I have seen them in the centre of some kick drums that feature in the Ludwig catalogs of the late 60's as seen here from their '67 catalogue (though this particular drum has only the 8 lugs and different spurs) , but you say that the drum couldn't possibly be from that era?

The kit in question is definitely not from the same era, they didn't use 6ply shells.

Just out of interest, when did they start producing 6ply shells?

I think it was in 1976.

Looking at the old Ludwig catalogues the only bass drum that seems to feature as 22" with 10 lugs, and with the arched spurs appears to be the 'Classic', years '71 through to '80. And in some of these catalogues the tom bracket does match that of the one in my photos. What are your thoughts on this guys?

That centered rail consolette is on a Jazzette set. An 18" bass drum which is 12" deep rather than the more common 14". Not all Jazzettes have the centered rail mount but most do. It's a geometry/gravity/design thing. Larger diameter bass drums with rail consolette mounts usually had the mount off center, but there were always variations due to user request.