Just to provide information for future searches, this is a quote from the Scherl & Roth catalog dated July 1999:
R606EH Symphony Bass Outfit
Fully carved by German craftsmen using select tonewoods. Solid spruce top with flamed maple back and ribs. Select ebony used for trim, while Tyrolean- style machine heads are solid brass. Steel strings.
R606EH Outfit includes S502H Glasser horsehair bow, SR6453 Artist bass bag.
R606E — Same as R606EH, but with S502 Glasser synthetic hair bow.
R66E — Same as R606EH, instrument only.
This was 12+ years ago, so the Korean model with the 606 model number seen here,
Nahrmann Bass Shop Inventory,
may be a later "CKB" version.