I've dug out some photos of 'TKS 33 SA 7924', an LHD car originally built as part of a batch for the 1972 RAC Rally (driven by Rauno Aaltonen and navigated by Paul Easter, running number 6, finishing 11th overall and 3rd in the Group 4 class) which went on to win the 1973 East African Safari Rally, driven by Shekhar Mehta and navigated by 'Lofty' Drews running number 1.
It has a later evolution of the 'Teikoku Dempa' intercom with external headphone jack units (which would appear to give more freedom of movement and less stress on the jack plugs) but it still gives a Model No. of 'Y-4009' and with a Serial No. of '066'. Volume control appears to be conventional 'pot' type dial knob rather than the rotary (I don't know what to call it?!) dial on your Serial No. '014' unit. Interesting that there is a 52 unit difference between serial numbers for a roughly two year production gap.
It was powered by a battery pack mounted behind the RH rollover bar mounting bracket, carrying two batteries (one connected, one spare) and press-on old battery radio style blue vinyl-covered connectors: