choir Czech Singers Chorus
conductor Václav Smetáček
orchestra Orchestr Národního Divadla
Record Company N.V. Cinerec
On the Sleeve: Czech Philharmonic Orchestra, The
On Disc: Prague National Theatre Orchestra

It should be Prague National Theatre Orchestra (See: Sborové Scény Ze Světových Oper). Probably a translation default (all the text in the booklet is in Dutch)

Comes in a booklet, a catalogue (Catalogus Prager Fruhling en Ideale Discotheek).
Year of release is not stated, but is taken from an external source.

Supraphon - Holland n.v. cinerec