From a 1969-70 "Bike Riders Aids" catalog published by the Holdsworthy Co, London (thanks Hilary)
"NUOVO RECORD GEAR" "Lightest in the world." "The latest example of Italian supremacy is made from a new alloy developed for use in rocketry. Fantastically light, the mechanism weighs only 7 1/4 ozs. Designed to encompass a range of 13-36T, an extra length tension spring is caried in a close fitting sleeve, giving full support to the toothed Nylon sprockets. widely spaced parallel arms, plus increased chain wrap and tension, allow the gear to operate over six speed freewheels."
Bill Laine
New Orleans