Does anyone know how old this furnace is,...?

Question

it's from an old Victorian house from 1890's.

Answer 1

It's RFO - really old.  It may have been converted from a coal or oil burner.

And, BTW, that's asbestos on the ducts, and it's fraying off.

Answer 2

Looks like very old. may be 40 or 50 years. But no one can be sure by just looking at the photo.

Answer 3

it looks original.

Answer 4

If it has very large distribution ducts it was probably installed when the house was built.