Help With Airmail Cover From Bolivia To England Via Airfrance

i would like to know about the date of this cover , any additional information welcome .
thank you

Both Bolivian stamps were issued in 1939.

It is hard to tell the date with the stamps being so poorly cancelled so Vayolene's noting the stamps were not issued until 1939 is perhaps the most helpful.on dating this cover.. Ass to the written instruction that it be send by Air France does not mean much as airmail would be sent on whatever was the fastest air service that was available on the day it went into the mail stream in Bolivia. It is possible the sender was hoping that the Bolivian Post Office would try to put it on an Air France flight to have it not go on a German Lufthansa flight given that it appears to be from around 1939 or 1940 or so. Here is a good article on French trans-Atlantic airmail service during the 1930s. https://docslib.org/doc/5923882/a%C...ntic-airmail

Good evening, I would add that the 1939 75 cent issues were overcharged to a new value of Bs. 1.40 on 17/Jan/1947. Interestingly the overcharge is expressed manually on the cover.