RARE Lockheed book "The L1011 Jet Transport" 1969 commercial market engineering

Description

RARE Lockheed L-1011 TriStar promotional book (presumably) to sell the Jet to  prospective airlines. Seems to have pictures that i have original photos of (now selling in live auction).
I have 2 of these books, both gold covered, one is hard back the other soft cover.
This Auction is for the soft cover. 40 pages. Condition is very good.
It came from the estate of a long time Lockheed employee who worked there from the fifties till the eighties.