If you look for past messages here, you'll find several posts that describe how 90% of the beads that are said to "Dutch" and "from the 17th C." (that's when the Dutch were most active), are actually 19th and 20th C., beads from Germany. Your beads are not very rare, and any suggestion that they warrant a high price is based on their misidentification as "Dutch."

Typical Dutch beads are distinctive (apart from those that closely copy Venetian beads of that time—drawn rosetta beads, usually finished a-speo). Your beads do not resemble actual Dutch beads, apart from being furnace-wound.

I could write out a long diatribe about wound Dutch beads, but I'd be repeating myself yet again, and some readers would be tired of reading it again. I'll see if i can find a link to past messages here.

Jamey