Unopened box of  12 "Bull Dog Jar Rubbers from the Boston Woven Hose & Rubber Co., Cambridge, Mass.   This box remains in super excellent condition showing only the lightest of wear and a touch of age darkening. It has nice color and a wonderful graphic of a Bull Dog with his head protruding through a large jar rubber. This box remains sealed and retains its original 12 jar rubbers.  

Circa: 1930's, 40's, dimensions, 3 3'8" x 3 3/8" x 2 1/4".