What happened to Santa in the UK?

It's always fun when you find something that separates the different pressings of the albums. One odd thing on the first pressing of Rocket to Russia in the UK is that Santa Claus is gone. On all other pressings, with one exception, Santa is standing by the north Pole on John Holmstroms drawing on backside of the sleeve. When the album was released in the UK one year later with WEA as a distributor Santa was back again.
The exception is the greek release on Philips which is based on the first UK cover. So no Santa Claus in Greece either.
Another thing that distinguishes the first UK press (and the greek press) from others is the black frame around the picture on the front.

Album: Rocket to Russia

Number: Sire/Phonogram 9103 255

Year: 1977

Country: UK

The first UK pressing...

...and the ordinary, US pressing.

The front with the black frame...

...and how it looks in the rest of the world.