There's a TVDX site that has been updated with some ancient sign-offs. How ancient--try 1964!http://www.oldtvguides.com/analog/This will blow you away!Included among them:WGBH-TVWTIC-TV (Predecessor to WFSB)WHDH-TV (Predecessor to WCVB)WTEV (Predecessor to WLNE)WNAC-TV (Predecessor to WNEV/WHDH)WNHC (Predecessor to WTNH)WJARWCBBWPRO (Predecessor to WPRI)WGANWHCT (during their pay TV days)WCDC (Relay to WTEN Albany)