This is more of a "what's it's application" ( what vehicle was it originally for ), than "what's it worth" question :

Attached pics show a Stewart Warner speedo reducer with 777F1-0400 stamped on one side, and T-4 stamped into the opposite side.

Does anyone know it's intended vehicle application & / or it's worth ?

regards,

fast_in_muskoka

The 1.0400 is the ratio of the gearbox.

They were for caliberating the speedometer,

Does anyone know what vehicle / transmission this particular reducer was intended for, or is it a generic that was intened for several applications ?

Closest I could trace it's numbers to was late 60's early 70's big block Ford . . .

Does anyone know what vehicle / transmission this particular reducer was intended for, or is it a generic that was intened for several applications ?

Closest I could trace it's numbers to was late 60's early 70's big block Ford . . .

Could be genaric, they were used for a calibration, I had several years
ago, gave away to a sprrdo shop, 20 years ago

Any vehicle, 3892220 for the P/N still obtainable on vehicles equipped with 4.11 and larger ratios, $22 each or was a couple yrs ago.

thanks John & Everette - much appreciated.