The Orvis Madison Bamboo Fly Rod you’re referring to is a classic model, highly regarded among bamboo rod enthusiasts. Here are the key details based on your specifications:

Orvis Madison Bamboo Fly Rod (7½ ft, 3½ oz, 2-Piece, 6 Line)
– Length: 7 feet 6 inches (7’6″)
– Weight: 3½ ounces (approx. 99 grams)
– Pieces: 2
– Line Weight: 6-weight (ideal for medium-sized trout streams and delicate presentations)

Orvis Madison Bamboo Fly Rod 7 1/2 ft. 3 1/2 oz. 2 Piece 6 Line

– Action: Likely a medium to medium-fast action, typical of high-quality bamboo rods.
– Ferrules: Probably nickel silver or high-quality metal ferrules.
– Grip: Probably a cigar or half-wells grip.
– Guides: Likely snake guides with a stripping guide.
– Reel Seat: Down-locking or sliding band, typical of vintage Orvis bamboo rods.

Historical Context & Value:
– The Madison was one of Orvis’s mid-range bamboo rods, named after the Madison River in Montana.
– These rods were handcrafted in Vermont and are known for their durability and smooth casting.
– Age: If it’s an older model (pre-1970s), it may have higher collector value.
– Condition Matters: Original finish, intact guides, and straightness affect value significantly.

Estimated Value (2024):
– Good Condition: $800–$1,500
– Excellent/Mint Condition: $1,500–$2,500+
– Rarity & Demand: Some Madison models (especially with unique tapers or provenance) can fetch higher prices.

Where to Sell or Appraise:
– Specialist Auction Houses (Lang’s, The Classic Fly Fisherman)
– Bamboo Rod Forums (Clark’s Classic Fly Rod Forum, Fiberglass Flyrodders)
– eBay (for reference, but fees apply)

Would you like help identifying the exact era or verifying authenticity? If so, photos of the rod, reel seat, and any markings (serial numbers, “Orvis” stampings) would be helpful.

Let me know if you’d like more details! 🎣