It sounds like you’re looking for vintage silk thread in size 00 or A, in brown 15, specifically for wrapping bamboo fly rods. Here’s some helpful information to guide your search:

1. Understanding the Specifications:
– Size 00 or A: These are very fine silk thread sizes traditionally used for delicate fly rod wraps. Size 00 is slightly finer than A, but both are suitable for bamboo rods.
– Brown 15: This refers to a specific vintage color code (often used by brands like Gudebrod, Pearsall’s, or Belding Corticelli). 15 is typically a medium-dark brown, sometimes called “Havana” or “Cigar Brown.”

2. Where to Find Vintage Silk Thread:
– Online Marketplaces:
– eBay (search for “vintage silk thread 00 or A brown 15”)
– Etsy (some sellers specialize in vintage fly-tying materials)
– Classic Fly Rod Forum Classifieds (forum members often trade/sell vintage supplies)
– Specialty Retailers:
– The Golden Witch (restoration supplies for bamboo rods)
– Bellinger (offers high-quality silk thread for rod building)
– J. Stockard Fly Fishing (sometimes carries vintage-style silk)

3. Modern Alternatives (If Vintage is Unavailable):
– YLI 100 Silk (similar to size A, available in brown shades)
– Pearsall’s Gossamer Silk (classic option for fly tying, may have close color matches)
– Belding Corticelli Silk (if you can find old stock)

Vintage Silk Thread for Bamboo Fly Rods Sizes 00 OR A - Brown #15

4. Tips for Authentic Restoration:
– If you’re restoring an antique rod, check if the original thread was pre-waxed or unwaxed. Some restorers prefer unwaxed silk with a color preserver before varnish.
– Test the color under varnish—some browns darken significantly when wet.

Would you like help identifying a specific brand or era of thread? Let me know if you need further details!