Key Code
 

Any idea how to reference a key code for a 1980 911SC coupe? Any help is appreciated

You can get the code from Porsche, then you’ll need to find someone with a key originator or code cutting machine that has the Porsche code cards.

or....you could remove one of the lock cylinders from the door handle and read the code on the individual brass flags.
(not as simple as it sounds)

Take your title, and VIN to the local Porsche dealer. They will order a new key with the light, and it is silly expensive, like 70 bucks, but you will get a brand new key that you can take to a key shop, and they can duplicate it for cheap.

That all assumes your locks are all original. My original key I carried was just worm out. It worked fine for the ignition, and the drivers side door, but took a lot of wiggling on the passenger side door, and would not work for the glove box, or the lock for the trunk handle to lock the trunk.

The new key operates everything perfectly.

Having done this many times, the dealer route is the quickest and most effective. They can overnight from Germany to have a fresh cut key within 2 days.

Step 2: Visit Keylow. ;)

Easiest solution is to use the services of Keys4Classics.com (no affiliation, just a happy customer.) Send them 3 or 4 high resolution digital photos of your key(s) and in a couple of weeks you get new keys and the key code. Discovered this service over 10 years ago when I needed additional keys for my newly purchased 1990 928. The items supplied by Keys4classics worked flawlessly in both doors, glove box, hatch, and ignition. They will use Porsche blanks or high quality Silca blanks as you prefer.