Thanks Perezfan. There's barely enough room for my hand between the knobs but they were made in different configurations. There's one bat that has a bigger gap than this one and one that's even closer.
If you go to this link and click on the pictures once and then again they will enlarge big enough for you to see a close up of all the bats.
http://www.geocities.com/vintagespor...ionHromek.html