Double Bass Anyone know this label?

[Schoolhouse]

Hi, I've seen this label on several occasions, does anyone know any name associated with the initials in the stylized treble clef logo? To me it seems to be E P or D P. Thanks.

 

[MIKMAN]

It's a label usually put on the instruments constructed in the Luby factory, Czech Republic (formerly Czechoslovakia). The initials refer to the master luthier who supervised or finished the instrument.

 

[Schoolhouse]

Thanks Mikman, Perhaps a member of the Pilar or Pulpaneck families? Any suggestions were to look for more information? Thanks again. This one is on a very nice instrument. Thanks again.