Rare pipe from the late 40'S or 50'S, made by/stamped  "COLUMBIA SILVER CO." 689-91-93 MCDONALD AVE. BROOKLYN, N.Y."  
Aluminum shank is polished to a mirror bright finish. The aluminum tube is 5/8 inch OD.
Original bit is perfect. There is knurling where it slides into the pipe that seem to be in good shape.
The original briar bowl is very unique, there is a threaded insert on the bottom that the bottom bowl screw threads up into.
The end valve is perfect and also quite unique. That is where the Company name and address is scribed. It is dished to the inside and threads onto the pipe.
These pipes don't come around often so now is your change to own a piece of metal pipe history!
The inside plunger is polished and like new. Pushing it into the end of the bit is what slightly expands the bit making it fit tightly into the pipe. 
This pipe is on smoking metals website.
Length: 5-5/16 inches. Bowl height top to bottom of briar: 1-7/16 inches. Bowl width: 1-3/8 inches. Chamber width: 3/4 inches. Depth: approx. 1-1/8 inch.
 
Shipping: Will be shipped within 2 business days of payment. Item will be packed VERY carefully to assure it arrives in the same condition it is in now.