If the saddle is Crosby Torino, it could be from the late 40's to late 50's.
One of the clues is the use of the term 'spring seat' (which is to say that the saddle is a 'spring tree' design) to indicate that the tree is designed to flex everywhere but the pommel. The top-line of this particular model saddle differs in the curve of the seat, especially in the twist area when viewed from the side. This design saddle is excellent for hunting and jumping, especially if you like a flat saddle.
A not on spring seat/spring tree saddles - some of them can be quite flexible which is the purpose of the design as it conforms better to the horse's back when the rider is seated. Prior to the 1960's, most saddles were rigid tree saddles, essentially solid wood without so much as even a hint of flexibility (like modern polo saddles). Smith Worthington introduced the spring seat/spring tree saddle in 1912 but they didn't catch on until the late 50's when people discovered that the saddles weighed a heck of a lot less than the rigid tree types.
Rigid tree saddles are making a comeback because of the availability of synthetic materials which are lighter than wood and more durable than spring tree saddles. Kiefer saddles are all one-piece moulded nylon or polyurothane rigid seats/rigid tree. They have a different feel compared to spring tree saddles.
__________________ Gilmore Horsemanship
"If people treated other people like horses treated other horses there'd be a lot fewer jackasses in the world!" ------- Me