The “Santa Fe Railway System Standard Dial” with Montgomery minute numbering was unique to the Santa Fe line.
Henry S. Montgomery was Santa Fe Railway’s general watch and clock inspector from 1896 to 1923, and by 1906 perfected a dial with upright minutes, from 1 to 60, printed on the outermost part of pocket watch and clock dials.
Here is a link with more detailed historical information about Montgomery watch dials in particular (scroll down the page to the paragraph titled "Marginal Minute Dials").
Unlike the smaller and more widely used Santa Fe standard station clock with identical dimensions except for a shorter pendulum and six-inch shorter pendulum box the “World” model regulators have a printed circle on the dial, containing a second hand. The circle is located above the center shaft holding the minute and hour hands.
This dial was commonly used on Seth Thomas regulators including the “short-drop”, “World”, and Regulators No. 2, No. 3, and No. 19.
Some clocks in the SFRR system used only the simple moniker
"Santa Fe Route" on the glass.
Some railroad locks carried signage indicating
time variance to "Railroad Standard Time".
Others had "City Time" (or "Local Time") and "Railroad Time"
on double dials (though following example is not SFRR).
The three clocks immediately above are Seth Thomas
Regulator No. 19 - perhaps the most prized of the
ST Regulators - especially with a SFRR dial.
However, in later years, trying to make their clocks look "modern",
SFRR modified (hacked up) Reg. 19s to make an odd-ball-looking remnant clock that used a SFRR-made door. The following two photos are of one of
those (extremely rare) SFRR clocks that we sold in 2007.
It has the common signage that you can also see in the two clocks just above, indicating the accuracy of the clock.
Clocks weren't the only SFRR inventory
to go through the "chop shop"!
(See an interesting SFRR 3463 1/16 wooden scale model
built by a former Enid OK watch and clock inspector
for the SFRR, the author of the definitive book on
SFRR Mongomery dials.)
All clocks in the SFRR system were reglarly maintained
and had a Time Service Department label.