This vintage Taylor Instruments Fisherman's Barometer measures 3-1/2" in diameter.  It is housed in a metal case.  On the front is, "Quick changes up or down, improve fishing in either zone.  Fish are active during sudden pressure changes anywhere on the dial.  If red pointer remains stationary for long periods of time, fish deeper".  "Copyright 1939, 1946, 1949, Taylor Instrument Companies" is at the bottom of the dial near the silver rim.  On the back is a dial for setting the altitude in your area. It is in excellent working condition.  Thanks for looking at this unusual vintage item!