[78-L] Brunswick 25000 series

[Han Enderman]

I see there are 2 Br 25000 series.
Of the earlier one, I know 25000/01 by Vessella's Italian band, playing light classical music.
The later one has a different blue label. 25000 is Richard Strauss, Heldenleben (pres.
part of a 5x12" album), cond. by composer, recd in Europe.
Can someone give the ranges and approx. release dates of these series, and/or
even more info?
I assume the earlier series is also 12"?

Han Enderman