23-07-2018, 10:19 AM
Further investigation reveals the following markings on the crown of the stuck one (and presumably the others):
11063
ID7
Made In England
R.S.
+.020"
Front (at least it's in the right way round
)
11063
ID7
Made In England
R.S.
+.020"
Front (at least it's in the right way round

![[Image: piston3.jpg]](http://www.g32.co.uk/images/piston3.jpg)