Most likely built in 1982. Yours is probably the EA40 Woodstock, not the EA 20 that was briefly called the Woodstock.
Some more info.
- single sharp cutaway dreadnought style, mahogany top, oval soundhole, bound body, abalone purfling/rosette, mahogany back/sides/neck, 21-fret bound rosewood fingerboard, rosewood bridge with pearl dot black pins, three-per-side chrome diecast tuners, Washburn 3200/Equis II preamp system, available in Black, Natural, Tobacco Sunburst, White, or Wine Red finish, mfg. 1979-1991.
Grading 100% Excellent Average
N/A $500 - 575 $325 - 375
Last MSR was $1,000.
In the mid-1980s, a spruce top replaced the mahogany top. Circa 1987, EQ300 electronics were introduced (sliders instead of knobs). By 1990, Equis II electronics were being used. This model had birdseye maple back/sides with Natural finish as an option