I have a new SAR-D on order (will get it today) and just purchased a SAR from a fellow member. What is the difference? I know the newest (or only) GSAR has the Tritium vials and date @ 4. Some have the cyclops, some don't. I believe all have the ETA movement (except for the TSAR). See what I mean? Just trying to find out for no other reason than because I don't know!