[drh4683]

Yes, this is the best chassis of them all. It might also be a 25DC56, 57, or 58. Highly doubt it, but its possible to be a 25CC25. All are horizontal SS chassis. Its the only exception to the rule of collecting tube type only sets, as these are built on the same frame. The whole idea of Zenith's metal chassis was for greater heat dissipation in the tube type sets as heat is the killer of electronic components (also, the high voltages and pulse currents strain parts). With the horizontal solid state, you get the same benefits of tube type chassis construction including there is essentially no heat being generated by any components to the point where the ambient temperature inside the cabinet rises. low B+ voltages too, so its basically the best thing out there from a longevity standpoint. Picture quality? The CRT's are indestructable in those, and the picture is about as good as you will see in CRT televisions. Flat chassis solid state was introduced in '71 as the 40BC50 but I don't think any exist. You have the models inbetween as previously mentioned and then the 25EC58, which was the last flat chassis, produced in 1974.

Pictured is a 1973, 25DC58 chassis: