A George III oak long case clock, eight-day movement, the hood…

• Calendar Aperture -
  A calendar aperture on a clock refers to a small window on the clock face that displays the day, month or year or all of these. The aperture is usually located on the clock's dial with the date data recorded on a wheel which is designed to rotate to show the correct date information.
  
  
  Some clocks have a manual adjustment for the date, while others are designed to automatically adjust for the date, including for leap years. The calendar aperture is a useful feature found on clocks from the 16th century, and on many types of clocks, including wall clocks, alarm clocks and wristwatches.
• Spandrel - An architectural term that in horology refers to the triangular ornamental decoration in the corners of of the dial plate. The spandrels are usually of cast brass and may be additonally chased and engraved. On painted dial clocks the spandrels are also usually painted.
• Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.
• Hood - In longcase clocks, the hood is the wooden case that surrounds the works and dial, and includes the glass front, which is usually hinged, so the door can be opened to wind the clock or adjust the time. In 18th and 19th century longcase clocks the hood usually slides forward for removal, allowing access to the works.
• Oak - Native to Europe and England, oak has been used for joinery, furniture and building since the beginning of the medieval civilisation. It is a pale yellow in colour when freshly cut and darkens with age to a mid brown colour.
  
  Oak as a furniture timber was superceded by walnut in the 17th century, and in the 18th century by mahogany,
  
  Semi-fossilised bog oak is black in colour, and is found in peat bogs where the trees have fallen and been preserved from decay by the bog. It is used for jewellery and small carved trinkets.
  
  Pollard oak is taken from an oak that has been regularly pollarded, that is the upper branches have been removed at the top of the trunk, result that new branches would appear, and over time the top would become ball-like. . When harvested and sawn, the timber displays a continuous surface of knotty circles. The timber was scarce and expensive and was used in more expensive pieces of furniture in the Regency and Victorian periods.
• George Iii - George III (1738 - 1820) was King of Great Britain and Ireland from 1760 to 1820.
• Date Aperture - A date aperture is a cut out section in the face of a watch or clock, displaying the day of the month.

This item has been included into following indexes:

• clocks, grandfather / longcase, period or age - 18th century, other 107