I just acquired an AF Seafarer Ref # 2446 SF. I an not well versed in newer (1960's +) Heuers so I'd like to find out what you guys may know about it such as: When it was made, what it is worth (other than whatever someone will pay), an idea of scarcity (either # produced or a more subjective rating- somewhat scarce, very scarce, etc.)

These are the data: Case #2446SF, ser #198797, Valjoux caliber 721 movement and case back signed HEUER-LEONIDAS SA, dial signed ABERCROMBIE & FITCH SEAFARER, crown signed HEUER, chronograph pushers and calendar corrector are proper Heuer style. Below is an image of the watch.