Bakelite Junior Round Calendox Perpetual Calendar

A 1930s, rare, green Bakelite perpetual calendar by Charles Letts & Co. Second-hand.
Availability: Out of stock.
Stock ID: 505

What's for sale?

This is a desktop perpetual calendar, made during the 1930s by Charles Letts & Company of London.

It's the "Junior Round" model from their "Calendox" range. This version is in the rarer green.

Setting the date is achieved by the turning the knob on the front, so that the current day is circled and the previous days appear struck though. A similar knob on the back changes the month. The window is celluloid.

Matching the day of the week to the current year's calendar requires manual intervention. Open the back and inside are paper templates which you use to allign the date with the correct the day of the week.

Bakelite has become a generic term for items made of the early plastics and resins, like Lucite, Catalin, Galalith, Bakelite and urea-formaldehyde. This hasn't been tested to determine which type it is.

Who made it and when?

It was made in England in the 1930s by Charles Letts & Co. Embossed on the back is:

  • THE CALANDOX REGD. ENGLISH PATENT NO. 348038
  • MADE IN LONDON ENGLAND

The cardboard backing reads:

  • THE CALENDOX JUNIOR ROUND
  • PATENT No 348038
  • CHARLES LETTS & CO LONDON

What condition is it in?

  • Second-hand
  • In fair to good condition
  • Fully operational
  • The pins and the knob and leaver on the back are rusting
  • The paper templates are marked and yellowed

What are the measurements?

  • 10.5cm high
  • 11cm wide
  • 98 grams

If you have any questions, just send an email to help@3bcshop.com.

Item Attributes
Attribute nameAttribute value
MakerCharles Letts & Co.
MaterialBakelite
Period1930s
OriginBritain
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