Hi wg_ski,
My databook clearly lists emitter-collector breakdown as 60 VDC, base open. Same for the Lambda (power supplies) data I have somewhere. I always go by that rating, and whatever the listed breakdown is on any transistor. Anyway, two original sources agree on that number. I believe it is the original rating.
That was supposed to be the minimal rating but there was differences from a manufacturer to another, FI RCA ones where said to support roughly 80V VCE, while the aluminium cased Motorola could eventually take more than 60V they also had the advantage of a 2.5MHz Ft instead of the usually minimaly specified 0.8MHz.