Note that "Bunny" Hammond is named as Harry T. Hammond whereas his correct name was Henry Talbot Hammond. Given the weight of evidence to the contrary, it has to be assumed that the brochure is incorrect. Possible explanations are that this copy was retrieved from the rubbish or perhaps Adastra were persuaded to accept a flawed product at a reduced price, given the prevailing economic hardships of the thirties.

P3
ADASTRA AERIAL SURVEYSwww.adastra.adastron.com