Hello ohiojack,
In order to get an answer about value you should show photos or at least give a detailed description.
As for your other question, if the gun is marked Weipert, it was probably made/retailed before 1919 in the town of Weipert, Sudetenland, Austria-Hungary; this small town was later part of Czechoslovakia as Veiprty, again Weipert under German occupation during WWII (possibly but IMO unlikely made/retailed then), and is today Veiprty in the Czech Republic.
Regards,
Jani