For efd274 re apparatus photos of the 1945-1960 era:
Perhaps the best source for photos of that period is the 1st or 2nd edition of "Wheels of the Bravest", by Jack Calderone and Jack Lerch. Ira Hoffman, at FSP Books & Videos, occasionally finds a copy to sell. They usually go for about $200 up to over $800, depending on condition.
If you, or others that may be interested, are able to get to the Mand Library at the FDNY Training Academy, there is a reference copy of "Wheels" at the Library, plus hundreds of photos of rigs of that era, set up in folders by company. The photos cannot be borrowed, but are available for examination at the Library. Hours are 0700-1600, Monday through Friday. It's best to call first at 212-860-9487 or 212-360-4413, as the staff is sometimes not available.