The calibre number on the movement, in this case ‘265’ will help to establish the quality of the movement. Quite often the presence of a calibre number suggests the movement is of a higher quality than a standard movement. The reference number helps to date the watch to the year of manufacture. There are websites where watch enthusiasts and dealers have put up reference number details. The watch manufacturer can also supply details. An original signed crown adds value to a vintage watch.
Images © Bip Mistry 2011