Terry's Saddles and parts catalogue from 1955. Given their interest in springs, perhaps it's no surprise that the company marketed an extensive range of sprung saddles, for motorcycles and bicycles alike.
Those shown are the Standard saddle, the Dominion, the Roadster, the Overseas model, and the C.T.C. saddle. On other pages there are also descriptions given for the Racing, Club, Club Tourist, and the Super Roadster. Some saddles were adjustable, enabling the rider to adjust the amount of "spring-iness" offered to their backside. A simple adjuster, operated by twisting a coin in the slot, gave a range of adjustments to suit all posteriors and terrain.