I have a Larsen coil marker "Special". It is for a wideband scanner antenna they make...it is not made for transmitting. It is a triband monitor antenna, covering VHF-UHF-800 megs. I own one of these for RX purposes.
However, the coil is a shorter one, about 1" or so in height.
I have also owned a taller coil (about 3" tall) that was made for 27-30 mHz, but that was marked as an NMO-27.