Well, I found patent information and your stove was built probably before 1954. Business open in 1945 and became Watertown Metal Products in 1954.
Citations and webpage links are below.
Do you have picture you could share?
(broken link removed to http://pipl.com/directory/name/Jaye/Richard)
Richard C Jaye -SYNCROMATIC CORPORATION, Record Type: Inventor, Issue Date: 1958-05-27, Open To Public Inspection Date: 1958-05-27, Patent Title: HOT AIR FURNACE, Patent Title: FOURNAISE A AIR CHAUD...
Richard C Jaye - SYNCROMATIC CORPORATION, Record Type: Inventor, Issue Date: 1954-04-20, Open To Public Inspection Date: 1954-04-20, Patent Title: PROTECTIVE AND AIR FEEDING FRONT FOR DOMESTIC HEATING FURNACES, Patent Title: PORTE PROTECTRICE ET ALIMENTATRICE D'AIR POUR FOURNAISES DE CHAUFFAGE DOMESTIQUE...
Richard C Jaye - SYNCROMATIC CORPORATION, Record Type: Inventor, Issue Date: 1947-04-01, Open To Public Inspection Date: 1947-04-01, Patent Title: FURNACE, Patent Title: FOURNAISE...
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(broken link removed)
lists Syncromatic Corp, Watertown, Furnaces, warm air as being a union company on page 19.
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Opened in 1945 as Syncromatic Corp., became Watertown Metal Products in 1954
http://books.google.com/books?id=pZ...num=5&ved=0CDQQ6AEwBA#v=onepage&q=Syncromatic +Watertown&f=false