Marksman #1780 Rifle

Plastic stock - actually most parts are plastic.

The pat number isnt a real patent number. Cant be found in the usa patent data base or overseas. It is in the right number for air rifles of that era.

.chatgpt
Why This Happens on Airguns

Especially with budget or importer brands (like Marksman in the later 20th century):

Factories sometimes marked products with patent references even when the patent was never assigned or the number was internal/foreign.

Another possibility is that the patent label was intended to point to a different number, but the stamping was truncated or mis-stamped at the factory.

This is fairly common with older airguns and inexpensive sporting goods — they look like valid patent numbers, but they don’t actually match any issued U.S. patent records.

Final Answer (no fluff)

Model: Marksman 1780 Deluxe

Stock: Plastic faux wood (factory correct)

Receiver marking: Generic Marksman patent stamp

Country: US-market import

Most likely year made: circa 1980
(late 1970s to very early 1980s)

If you later get:

the full box end flap

or manual paperwork

we could tighten it to within a single year — but with what you’ve shown, 1980 is the best-supported answer.

Still probing anvenues with gpt. It doesn't do stuff automatically and you have to constantly send it down different paths that you or I would do naturally. It actually put the date range between 78 and 82.
I'll see if can drag up more info while its raining.

Mate - Im impressed with your work to date. Many thanks indeed