hello and welcome, indeed the best thing to do in general when using this site is to use its very large archives.
Once you do that it will be advisable to continue an existing thread because this gets you MORE rather than less attention to any particular subject since it will be published anyway in the new active threads AND it will automatically send an alert to all the people whom have previously partaken to the thread on that subject.
The Dearman saxophones were certainly all stenciled.
Many would be Italian made ( but I think that yours is NOT), this one that you are linking may or may not be one of those but the pictures that you are offering are insufficient to make a certain identification. The manufacturing year, will be, at best a guess even if we know for sure who made it because few of these brands kept records that were exact. https://forum.saxontheweb.net/showthread.php?218336-Shortcomings-of-Dearman-Alto-Sax
Indeed if the horn needs an overhaul you may ask yourself if your money will not be better spent on something else since its cost may raise to anything from €300 to €700 for the overhaul itself but its commercial value would be marginally affected by the added overhaul.
Looks like the horn is in fair condition. Depending on playing condition buyer value @$100-$200 USD. I see the neck needs cork and no mouthpiece in pictures. Allow for $100-$500 in repairs and $25-$350 for a mouthpiece. If you do not understand the mechanics of this instrument take it to a technician for review of service cost. Then make offer.
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