Restored, hard to find Kirsten "MB" (Mariner Black) pipe with o-rings on both ends for ease of cleaning and a perfect seal. 
This is a Straight 7/16 inch ID, 3-3/4 inch long shank Kirsten tobacco pipe.  
 
Left side of aluminum body is stamped KIRSTEN. Bottom is stamped MADE IN U.S.A. - MB.
The aluminum body has a nice original black anodized finish. 
The bit is a beautiful, new Lucite, no bite or tooth marks with a new ramrod.
Original beautiful restored Kirsten black rusticated and blasted briar bowl. 
End cap/valve is very nice, with new o-ring.
EXTRA O-RINGS ALWAYS INCLUDED.
 
Length: 5- 7/8 inches. Bowl height-bottom of bowl to top of bowl: 1-3/8 inches. Bowl width at widest point: 1-1/2 inches. Chamber width: 15/16 inch. depth: approx. 1 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.