Toploader Speedo Gear Color ? Brown ? Green ?

[brandosaac]

I am familar with toploaders and the most of the speedo gears ....
I am refering to the gear on the mainshaft of the toploader not the gear at the end of a speedo cable.

Black .... 64-73 all toploaders (except Galaxie Tiger and 64 Fairlane) for use with 2.75-3.50 rear end gear ,  passenger side access hole on extension housing
Pink ......   same as above ..................................................... but for use with 3.50-4.11 rear end gear ,  passenger side access hole on extension housing
Yellow ....  Galaxie , Tiger and 64 Fairlane  (cut opposite of black and pink)  driver side access hole on extension housing

but does anyone know when a brown or green speedo gear are used ?
possibly Tiger with different rear end gear ratio ??
They have the same cut as the yellow , so im guessing must be a galaxie, tiger or fairlane application

thank you