Actually, the walnut just didn't "come into contact" with salt...it was infused (by browning)...can you say "oops"? Between late 1966 and 1972 Browning used a salt-curing process to speed the drying time needed for its walnut stock blanks. Unfortunately, the salt would be released from the wood and oxidize the metal surface(s) after a period of time. These guns--especially bolt-action rifles in all grades--some BARs, Superposed shotguns and T-bolt models should be examined carefully around the edges of the wood for signs of freckling and rust. Check screws and wood under the buttplate as well. Glen Jensen, Browning's historian, suggests using a 1 percent silver-nitrate solution on a small, undisturbed portion of wood--if the wood sample turns white, it's a saltwood gun; if the wood color turns to a light purple, it's OK. Discount values on Browning guns can show telltale characteristics of salt corrosion by 15 to 50 percent, depending on how much rusting has occurred.