Mason & Risch spinet piano - age?

[moniakaye]

Hello,

We recently acquired an old spinet piano.  On the outside it says "Winter - New York - Toronto", while on the inside there is a Mason & Risch stamp.  I believe the serial number is 143425, model 365.  Can anyone tell me the year this piano was made or point me in the right direction to obtain this info?   I have exhausted my resources and have not been able to find anything.

Thanks in advance!

[silverwoodpianos]

6 digit in the 140's would be one of the instruments in the final year of 1978.

 365 is a factory line production code.