Hi, It's a real reproduction :-)
Antique fly catchers have an opening in the base for the flies to get in - I presume this is a bottle without a hole.
This is a loose facsimile of a 17th century wine bottle with an applied seal. Originals with a seal in perfect shape are worth thousands. Modern re-creations like this are made at the Jamestown Glasshouse and perhaps other places. These are collectible - I have seen such bottles trade in the $10-30 range.
Christopher Woods
Historic Glasshouse