Has anyone ever heard of a 67 Plymouth Silver Edition? I have been told that I own one, but how do I confirm it.

You mean a "Silver Special"

It was an option package that came in 3 forms, silver interior, silver vinyl roof, and silver paint (all available separately) but the most true to the name "Silver Special" had all 3 including:

AA1 Buffed Silver Paint
Silver two tone door panels
Silver vinyl roof

The seat inserts, door panels, and vinyl roof were the same color and grain

They didn't keep production numbers on these options but they weren't all that rare when new, pretty common actually. Now days it's nice to find a clean example but they do not typically bring huge premiums over other differently optioned nicely equipped 67 Belvederes. They even made one original with a Hemi (from right here in Washington). To confirm yours post the fender tag or Broadcast sheet.

Silver Special Hemi 67 Belv II

I have been told that my car was a "Silver Edition" by not one but a few different people. It has silver with dark blue inserts in the seats and door panels. The dark blue inserts have a course grain with silver down in to the grain. Boars grain. The vynal top even matches the inserts. Original color on the car is a touquois metallic. It's all original with 100,012 miles on it. Perfect interior and body. Nicely optioned. If I don't have a "Silver Edition" or a "Silver Special", at least I have a nice car.

I don't believe a Silver Edition was ever produced, It's more likely that your informers were just recalling the "Silver Special" name wrong. As far as different colored cars go, as mentioned, you could get 3 trim levels, yours had 2 of the 3. They did offer a "Spring Special" which was usually blue with a silver special interior. They made one of those with a Hemi as well

Spring Special

So, there is a possibility that my car is a "Silver Special"?, even though it is tourquois?

I'd say so. Mine has everything but the paint; it's white.

Mine is a 383/ 4 barrel, auto, air, ps, pb, radio, dual exhaust. It reminds me of my old road runner. Gave it to my wife 14 years ago for a wedding present, and when it hit 100,000 miles, she put it in storage asap. It does need a new coat of paint but the interior is spotless and the body is straight and rust free. A little old lady had it originally and my local Hemi guru bought it from her. His name was Ray Christian.

AFAIK, the Silver Special was only available on the hardtop Belvedere II.
Besides the things Scott mentioned, they also had a pin stripe instead of the anodized aluminum upper side molding.
I don't place any added value to them as I would rather have a regular Belvedere II, but that's just me, we all don't have the same tastes.

Here is the only document I've found on the subject, I filed this away 20 years ago.....Took a bit of digging to locate it

OK Larry. Let's see some pics of that beast!!!

Won't be having any pictures until I bring it out of the heated storage garage next year. It's a nice one.

Silver Special door panel.