QUOTE(RobW @ Nov 24 2013, 06:46 AM)
Once the ### LLL format was done, CA went to a #LLL### format.
This means that your car was purchased and plated in CA after being bought and plated in another state.
Blue plate, and yes a re-plate from the original '73 in service date. I would guess '77-78 ish. Not that big of a deal. Still a blue plate.
FWIW - my 914 was delivered to Kansas City, moved out to CA in 75-76 and given the plate below.
As always, Google is our friend. The 7 digit yellow on blue plates appeared in 1980. They were joined by reflectorized blue on white plates in 1982, and replaced by the latter in 1987. This means the car in question was replated sometime in the 1980-1987. Perhaps the owner at the time had mangled plates, or was issued a citation for no front plate, or the plates were stolen, or he/she just wanted new plates.
The Cap'n