Models produced between 1961 and 1965 have the original small pickguard; in 1966 the guitar was redesigned slightly with a different neck joint, and the modern larger semi-symmetrical "batwing" pickguard first appeared in 1967. This design continued until 1971, when variations of the SG were sold with a raised Les Paul style pickguard and a front-mounted control plate. The low-end SG-100 and the P-90 equipped SG-200 appeared during this time, as well as the luxurious SG Pro and SG Deluxe guitars. Vibrato (tremolo arm) tailpieces were also introduced as options.
So tell us about yours; make & model, where you found it, etc. Thought this might make a worthwhile thread to discuss, ask questions, tell funny related stories and post pics. Mine's a 1967 and my most prized possession.