I recently picked up a List 27( F1, or later F20 equivalent) which was the bottom tier of the medium grade guns.I am more than happy with it.
I don't mind the look of the side safety,however I don't tend to use a trigger bolt.
One other nice thing about Greener guns is you can email Greener and his Great Grandson will be able to tell you about your gun.
How many makers can still do that?
Not a big deal perhaps but for those that are interested in more than just shooting their guns its a bonus.
Does it look like this one?
http://doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=253130&page=1If you have not already I recommend "the gun and its development"by W.W.Greener,its a very interesting period read.