old furnaces have a limited appeal-but some people here like them This one appears to have series reactor speed control of the blower motor.Some furnaces of around~1962-65 have Delco "inside-out" direct drive blower motor.
Is part of ICP International Comfort Products owned byUTC which also owns Carrier.
International Comfort Products (ICP), headquartered in Lewisburg, Tennessee, was acquired by Carrier in 1999. In the 1990s Carrier stopped using the "Day & Night" brand (which was the "D" in the BDP division, or Bryant-Day & Night-Payne) but it was revived in 2006 by ICP
Gas jets look like the ones on my 1920 gas stove. You can adjust the air intake.
Looks fine to me.
Maybe Vacuum and wash things up with some hot soapy water, replace filter..
Are U having problems with it?