[Product Information]

• Enter your model numberto make sure this fits.
• Its origin goes back some 500 years
• An early， simple pocket calculator from an era when 50 years were akin to perpetual
• Intriguing， also effective Calculate the day of the week for any given future date， within a 50-year span
• To use， simply rotate dial until the selected year lines up with the selected month
• Calculate the day of the week for any given future date， within a 50-year span