German Led Zeppelin I Vinyl pressing year?

Hello, I bought an used german Led Zeppelin I vinyl. I searched for two days on internet websites and forums, but i still can't determine my vinyl year of pressing.

I have found the same vinyl sleeve with other vinyl label inside and the same vinyl label with other vinyl sleeve. I can't find them toghether.

Speaking about the label. In the most cases it has a "GEMA" logo next to the Stereo logo. In my case, my label has a "K" next to the Stereo logo so i just have seen like 2 of them in forums, but they don't show an accurate or believable vinyl pressing date.

The matrix codes are:
Side 1: ST-A-681461-A-AT-RG-W-WEA
Side 2: ST-A-681462-B

The vinyl vinyl says: Manufactured in Germany

Images:

20190309-190217-01
20190309-190251-01
20190311-002451-01
20190311-002526-01
20190311-002542-01

Please help, i really wanna know the year of my copy, thanks !!

 

Almost forgot.

ATL 40031 (SD 8216)

 

It's this one: Led Zeppelin - Led Zeppelin
This is included int he images:


Marquee Moon was releaesed in 1977.
Heirja was released in 1976.

So '77 maybe '78.