I am not any sort of Parker expert, but I've attempted to understand the grading as explained in the Blue Book. All typos are mine.
A GH should have a 2 on the water table of the frame.
Frame size is marked on the bottom of the rear barrel lug on breech. For a 12 ga. it would typically be 2, 1(better), 1/2(rare),
The condition is rated on case color remaining, not barrel color. A Parker is NOT 60% if the barrel bluing and stock varnish is 60% BUT the case colors are 10%. A 20% case color gun will probably have 90% barrels.
Damascus barreled guns are collectible if original case colors are over 40%. 90% or better gets you up in the price range of a steel barreled gun.
Under 40% the price falls off rapidly and no longer compares to a steel barreled gun.
"As an example, a steel D Grade without ejectors might range from $1500 to $7000(10%-100%) with a rather downward progression of values in between the high and the low values. A 100% damascus gun D Grade could have a $3500+ price tag while a 5%-15% specimen is typically priced in the $375-$550 range. Remember, the guns are not rare, but the condition is."
The 23rd Ed. Blue Book lists:
a steel 12 ga. GH from $800 to $3775(10%-98%).
a steel 12 ga. DH from $995 to $5250(10%-98%)
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Then there's the question of ejectors, beavertail forearm, vent rib, straight English stock, skeleton butt plate and 26-inch barrels w/ open chokes. Looks like each one of these could add 20%.
In summary, I dunno. Looks like a $400 or $500 gun PLUS the options listed above, if any.
Still, if you reeeaally like it, it's only money.
Hope this helps.
John
(edited to clean up a typo or two. It's late.)
