Peace, mercy, and blessings of God be upon you. I present to you a classic Sperina Calendar watch, an antique (Vintage) Swiss wristwatch. It features a black dial with a date window and a brown fabric strap. Dial Details: The dial indicates that it is Waterproof, Antimagnetic, and contains 21 Jewels. History and Context: The "Sperina" brand was known for producing affordable mechanical watches during the mid-20th century (especially in the 1950s and 1960s). Care Advice: Due to the age of this watch, it is recommended to keep it away from water and wind it gently by hand to maintain its mechanism. For an accurate assessment of its value and history, it is best to show it to a local watch expert or examine the reference numbers engraved on the back cover.