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- Mass Bay Medical Center, inside the MRI machine after the second elevator.
- Milton General Hospital after the third elevator, in a box on the corner.
- Occasionally sold by Percy at Diamond City Surplus.
- Occasionally sold by Myrna at Diamond City Surplus.
- Occasionally sold by Rowdy at Atom Cats Garage.
- Occasionally sold by Alexis Combes at Vault 81.
- Occasionally sold by Deb at Bunker Hill.
- 2 are located inside the Boston Airport warehouse, on a shelf.
- Sometimes found at The Institute's science lab.
- Medford Memorial Hospital in a room behind the operating theater (3rd floor).
- One is in the cellar of the Electrical Hobbyist's club.
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