Pattern 743 is Strand’s focusable Fresnel lantern for stage lighting, producing a soft-edged beam from 15° spot to 80° flood with a 200 mm short-focus Fresnel lens. It uses a 1000 W tungsten-halogen lamp (T/11 GX9.5 base) and offers lead-screw focus from the front and rear, plus a four‑door rotatable barndoor system. The unit originally appeared in 1971 and was discontinued in 1983; frame size is 215 mm square, weight 6.8 kg, with about 320 mm length and 345 mm maximum width.