Barholm (click on photographs to bring up bigger/better versions).
|Barholm, Lincs. Thanks
to John Hurst for the photo on the left and to Mike Woolford for a 2015 update,
on the right (where you can also spot a semi-rotary).
semi-rotary at Barholm, Lincs.
Markings: No5. (This suggests a 1½" bore.)