Both of my ? Miller Falls or Mill Falls ? - chucks 3 and 4 jaw that
were bought with or along with my sheldon at the hardware store in Ca in
'52
had reversible jaws. Both were different.

The Three jaw has two sets of numbered jaws.
The four jaw are reversible.

Martin
--
Martin Eastburn, Barbara Eastburn
@ home at Lion's Lair with our computer
NRA LOH, NRA Life
NRA Second Amendment Task Force Charter Founder