You must be referring to the 'TELLY' air rifle. The following might give you more nformation:
RELUM LIMITED
Previous London distributor of several lines of Hungarian products including airguns, founded by George Muller in 1954.
Relum is a reverse version of the name Muller. Brands included Relum, Jelly, FEG Telly (sometimes misread as Jelly), Rapide, Taurus, and Super Tornado. Most are heavily built economy line air rifles with .177 MV in the 500FPS area. Relum Limited was still in business as of 1980. Resale values generally well under £75.
ATB, Eric
Demic, miserable, grumpy old git! Feinwerkbau Sport Appreciation Society.
I don't mind what sexual, religious or political persuasion you are, just don't impose them on me!!