All Elastolin figures stands on plastic socles. Just like as there are painting variants there are different socles. The shape has never been changed, only the colours.
The first plastic figures had a dark green socle. Beneath you can read a J and the brandname Elastolin. The later socles did not have this J. They differ in colour. Most heave different kind of green colours. The pearl shell socle is very rare and much looked for. You can recognize the later Preiser Socle immediately. In all the Hausser socles you can find a little round stansed hole. Preiser socles never have this small hole.