This vintage piggy bank from Upsala Sparbank was manufactured by the renowned Swedish company Nordiska Apparatfabriken in Stockholm, as indicated by the stamp on the underside. Banks distributed these sturdy metal banks during the mid-20th century to encourage saving.
Markings: The bottom plate bears the manufacturer's logo and the serial number 33831.
Slots: It features two separate openings on the short sides—a narrow, elongated slot for banknotes and a wider slot designed for coins.
Locking mechanism: The keyhole is located on the bottom. Originally, the bank retained the key, requiring the customer to visit the branch to empty the bank and deposit the funds into their savings account.
Available at the link below
https://www.tradera.com/item/749155215