JAEGER LECOULTRE SQUARE Serial number: 991581 A. 18k yellow gold case. Light grey dial with baton hour markers. Hand-wound mechanical movement (calibre K818/C). Leather strap with an unmarked gold-plated metal pin buckle. Plexiglass crystal. Circa 1960. Dimensions: 26 x 34 mm. Gross weight: 27.1 g. An 18k gold wristwatch with a mechanical movement, by Jaeger-LeCoultre. Circa 1960. RC: Sold as is, with signs of wear and use. Movement was functioning at the time of writing this description; a routine service is recommended; no warranty provided.