The EIG Model E-16 4-barrel .22 Derringer

Twenty years after the last Mossberg Brownie was made, EIG made a copy of it. According to the Italian date code on this gun (XXII), it was made in 1966. Here are links to the Field & Stream article I referenced to a list of Italian date codes:
https://www.fieldandstream.com/EIG-Derringer/
https://unblinkingeye.com/Guns/IDC/idc.html