Fly From London to Paris in a Biplane!
A fantastic bird's-eye view map of the early air route (circa 1928) between London and Paris, across the English Channel.
The map was produced as a joint promotion of Imperial Airways (the early British commercial long-range airline, operating from 1924 to 1939) and Shell (Shell-Mex) promoting their route and their petroleum products, respectively.
The pleasant blue-green pastoral look of the route between Croydon Airfield and Le Bourget, north of Paris, belies the danger of air travel at the time; in its first six years, Imperial Airways had 7 "incidents" resulting in 32 fatalities - even though their aircraft typically carried 20 passengers or fewer.
The London-Paris Imperial Airways route was evidently the first to screen a film for passengers; the 1925 film The Lost World.
The present map was preceded by a Handley Page map of the same route; that map had many similarities to the present one but was not colored.
Rumsey (8327) estimates the date as 1928. The map and covers show a three-engine variant of the Handley Page Type W (likely a W.8f, introduced around 1924).