Hi,
I have just found a Hutchens's Mitre shooter, and if this will help, mine has a plaque on it.
It reads ;
Hutchen's Patent Mitre Shooter
"ECLIPSE"
No: 1700 (number stamped manually on the plaque)
SOLE MAKERS
N.Holman & Sons, St.Just.Penzance.
Hope this sheds some light,
regards,
G