I can't comment on the reliability of this info but from:-
https://reel-reel.com/tape-recorder/elizabethan-ft1/
Quote:
By 1960 the Elizabethan line of recorders had become so popular that EAP (Electro Audio Products) officially
changed its name to Elizabethan (Tape Recorders) Ltd. The first true Elizabethan model was this, the quarter-track model FT1. It had a single-speed BSR TD1 Monardeck with high-quality Miniflux heads and a 5¾ inch spool capacity. It was quite probably the first British quarter-track recorder on the market.
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The TD4 was a smaller deck designed for battery portables.
https://www.vintage-radio.net/forum/...5&postcount=29
Cheers