9Maserati Mistral
10/110Jaguar Mark 10
11/111Gran Turismo Coupe
12/112Chrysler Imperial
13Ford Thunderbird [Never Issued]
14/114Ford Zodiac Estate Car
15/115Volkswagen Microbus
16/116Motorway Police Patrol Car
17/117Mercedes Benz 220SE
18/118Ford Corsair
19/119Volvo P1800S
20/120Volkswagen Microbus Ambulance
21/121Fiat 2300S Coupe
22/122Rolls Royce Silver Cloud Convertible
23/123Alfa Romeo 1600 Giulia Spyder
24Foden Tipper (Commercial)
25International Harvester Tractor w/Shovel (Commercial)
26Foden Fuel Tanker (Commercial)
27/127Ford (German) Taunus
28/128Peugeot 404
29Foden Express Freight Truck (Commercial)
30Merryweather Turntable Fire Engine (Commercial)
31Ford Transit Breakdown (Commercial)
32/132Ford Corsair Fire Chief Car
33Austin Western Mobile Crane (Commercial)
34Euclid 82-80 Crawler Tractor (Commercial)
36Lotus Europa

By the mid-1960s Dinky had lost its virtual dominance of the toy car market to Matchbox. This is probably why Lone Star decided to drop the 1:50 scale Roadmasters series in favour of a new, smaller-scale range. According to the earliest trade announcements, such as the advertisement which appeared in the trade journal Toys International for January-February 1965, the new range of cars was to be called 'Lone Star Imps'.

By the time the toys reached the public the following year the name had been changed to Impy, but to maintain brand continuity the Roadmaster name was retained in the full title of the series: Roadmaster Impy Super Cars. The average length of Impy models was about three inches, so that they really fitted in half-way between the Matchbox and Dinky-Corgi sizes. Their main selling point was that they had more opening features than the Lesney products, hence the advertising slogan proclaiming Impys to be 'the cars with everything'; in fact, the first edition catalogue lists '13 engineering features' fitted to every model.

(From the book Lonestar, The Toy Company and Its Model Cars, by Andrew Ralston)