Spirit level vial leaked

ACORN

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I’ve got a Johnson’s brass bound mahogany masons level my then fiancé bought me 30+ years ago. Two of the vials have leaked and there is no liquid in them. I contacted Johnson’s to see if they could repair it to no avail. Vials are available on the web. The vials are set in plastic with no screws visible. Any clue on how to take them out? I’d like to fix it instead of tossing it.
 
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Often the vials were set with plaster of Paris, at least the glass ones. To replace them you would chip out the old PoP and clean it up good. Now, find a second level that you trust. Find or creat a level area. Mix up you PoP and get ready. Place the level to be repaired on the level surface. Slop in the PoP and insert the replacement vial. Work quickly, make sure the replacement vial reads true. Let the plaster cure. Remove whatever needs to be removed to replace the cover glass.

If it is the plumb vials much easier. Use a plumb bob to find the true.

Kevin
 
Its definitely some type of plastic.
Here’s what I’m working on.
The other side is the same. No screws. :(
 

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There’s no gasket. Just hard plastic on either side, but the part that holds the vials is a different color. I may put a little heat to it to see if it softens up.
 
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