Hi Alsfarms, Yes Columbia rear axles used in Columbia, and also made for anyone else who wanted one.
Obviously. Moon manufactured 1906-1930.
I have a question for you, please?
Are there any numbers stamped on the front top of the centre part of the axle housing, (diff side),or on the rear, top of the differential housing.
If so, they should be batch number/ year and gearing ratio.
These numbers are not usually present on Columbia for Colombia used rear axles, (from limited Columbia owners I have asked that were 1923 cars), but were apparently on Columbia made to order products.
Likewise, the front axle could have a parts number cast into it?
Below, ad 1920, from eBay.
https://www.ebay.com.au/itm/294953527417
from
https://www.ebay.com.au/itm/294043014036