This is a beautiful antique "two blade stag pen knife" from the Tidioute Cutlery Company.
Any dyed-in-the-wool knife collector will know that the town of Tidioute Pennsylvania has been one of the country's largest centers for the production of cutlery since the mid 1800s.
There are two distinct and unrelated Tidioute Cutlery Companies. The Union Cutlery Company (the first to manufacture trademarked Ka-Bar knives) began life as the Tidioute Cutlery Company in 1897. It wouldn't be long after that the company was dissolved and taken over by the Union Razor Company in 1909 (which soon became the Union Cutlery Company).
This particular pocket knife can be attributed to the slightly later incarnation of the Tidioute Company that was started in 1909, with equipment purchased from an auction of the Booth Brother Cutlery Company.
In 1912, the company was purchased by Harry Baldwin and became Baldwin Cutlery. Therefore, we can say that this lovely knife was manufactured at some time between 1909 and 1912.
The handle is made of genuine stag antler and exhibits a rich and beautiful patina. The center bears a nice honey-brown color while the smoother areas are a mottles amber shade. There is an applied shield-shaped cartouche on one side of the handle made of nickel-silver; the bolsters are also nickel silver. The liners and pins are gold-colored brass.
There are two blades, both made of carbon steel. The longer clip blade has a smooth open and close while the smaller pen blade has an open, close, and half-snap action.
The clip blade is stamped on the tang with the curved "Tidioute PA" hallmark (attributing to the Tidioute later purchased by Harry Baldwin) and the pen blade is marked Tidioute Cutlery Co. PA" on the tang.
As you can see, there are some small signs of wear and slight pitting to each blade, though they remain in great antique condition. There are some very small chips to the lower end of the bolster nearest the cartouche, though it is barely visible.
Overall, the handle, blades and components remain in excellent antique condition.
Measurements: Handle (w/ bolsters): 3 ½" long, ½"-5/8" wide, ½" wide Clip blade: 2 ¾" long Pen blade: 1 ¾" long Weight: 57.6 grams (2.03 oz)