Very early Corgi Toys Concertina Leaflet from 1957, no. 50/157/K1 box insert fold out mini catalog showing 10 early Corgi models (regular and mechanical versions).  The two-sided small catalogs were included in the boxes of Corgi diecast cars and trucks during the 1950's.  The leaflet measures 5 1/2" x 3 1/2" folded (140mm x 89mm), and folds out to a size of 11" x 3 1/2"  (280mm x 89mm). It was published in Great Britain by Playcraft Toys Ltd, London.

Models in this leaflet include:

• 205/205M Riley Pathfinder Saloon
• 202/202M Morris Cowley Saloon
• 301 Triumph T.R. 2 Sports Car
• 203/203M Vauxhall Velox Saloon
• 207/207M Standard Vanguard III Saloon
• 403/403M Bedford 12 cwt. Van "Daily Express"
• 453 Commer "Walls" Refrigerator Van
• 206/206M Hillman Husky
• 405/405M Bedford "Utilecon" A.F.S. Tender
• 455 Karrier "Bantam" Two Tonner

The leaflet also an illustration showing the major features of Corgi cars including the mechanical power drive models, and there is info on joining the Corgi Model Club. 

Condition: The catalog has a faint "50¢" written in pencil on the blue 'Corgi Toys' panel.  The leaflet is otherwise in very good condition. (see photos).