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markr

Stem from crown.

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Unscrew it ? Some have had adhesive/cement put on before being screwed in which can make things more complicated.

I'd say it's worth dipping the whole thing into some cleaning substance first (one that is safe and won't ruin the crown if it's plated) and then try and unscrew it. Maybe use a small pin vise for the stem...

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I mount the stem on a stem vice and unscrew, The problem you may face is when  the crown dose not want to come out peacefully, normally if glue is previously used, rust ....so on, the solutions are: 

Soaking in aceton , use of rust killer, penetrating oil, heat ......so on, is to be used accordingly. 

 

 

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