Early Monte Carlo (Three Buttons)

Earliest Version

The earliest version has the “fishtail” on the minute hand; “Auto-Rallye” printed above the Heuer shield and “Monte Carlo” printed in script; and “Pat. Appl. For” above the date window

Later Version

“Fishtail” minute had is replaced with standard version of the minute hand

Standard Version

dial marked “Pat. Appl. For”;

Later Version -- Dial Marked "Patent"

dial marked “Patent”

Latest Version (Dial Marked for Tritium)

dial marked “Patent” and for tritium (T<25 mc)