Sorry, for my knowledge about Horn type,
========================================
May I ask
POM horn is RIGHT or a spelling mistake of Pin Horn?
As
IN and
OM both need Similar right hand typing, so it may be a typing error.
KeyBoard Layout
===============QWERTYU
IOP
ASDFGHJKL
ZXCVB
NMBut in contradictory, more than one site have used
POM word looks valid to me. Again, POM Horns specified with the bottom piece little different.
If any one enlighten this, I would be grateful and thanks in advance.
Though this is not require in practical field, but I cannot satisfy myself.