Up for Buy-It-Now is a new old replacement stock distributor vacuum, Sorensen part number VC-320.  According to my vintage manuals, this is used on the following models and years:

1949 Buick...Series 50, 70

1950-1952 Buick..All models

 The vacuum is in brand new, never used condition and is free of any damage.   I applied a small amount of vacuum to the assembly and it functions properly.   The plunger rod is free. The original Sorensen box is in fair condition. 

  Please feel free to E-mail me questions.  International bidders are always welcome.  Thanks for looking!