[78-L] Mercury Made in Czechoslovakia

[Han Enderman]

I have some images in 3 Mercury series, which state along the lower rim:
'Mercury Record Corporation, Chicago. Ill.  Made in Czechoslovakia'.

The B-15000 series has Bulgarian music (B-15014, mxs 45268/69, and
B-15026), but B-15015 is:
45277 Waktol Potono Padi - Instrumental Group and Vocal (East Indies)
[part of an ethnic project?]

A B-50000 series has the Prague Military Orch. (B-50043, mxs 45389/90),
and a tango by Karel Vacek (B-50088).

Were these records released in Czechoslovakia or in the US or both?
Actually Mer B-15014 = Supraphon(Cz) B-15014.

There is also a D-60000 series (labels may be gold with green print),
which has Keynote recordings by Hawkins (D-60001), Tristano, Neal Hefti
and Red Rodney.
This suggests a series intended for mid-Europe.

Han Enderman