I saw a few old Meccano magazines today and was looking at the adverts. stick another post up about the Webley ads but this is about Relums.
From October 1961 there was an advert for the Slavia
No1 bore 618R
No2 Bore 622

From October 1963 there was an advert for the Tornado with numbers I did not recognise

Telly 877 No1 bore
Telly 822 No2 bore

Telly 977 No1 bore
Telly 922 No2 bore

There was no mention of another model other than the Tornado in the advert.
However, it did mention

Relum Air rifles
Relum ltd
Ossulston Street
London
Nw1 and there was a small picture of a ship in a circle with "Artex" underneath it.

Any info IJ? or anyone else?