![Bonhams : Gruen. An unusual and rare 10K gold filled manual wind drivers wristwatch 'Batwing' Curvex Precision, Ref 440-641, Circa 1940 Bonhams : Gruen. An unusual and rare 10K gold filled manual wind drivers wristwatch 'Batwing' Curvex Precision, Ref 440-641, Circa 1940](https://images1.bonhams.com/image?src=Images/live/2021-02/08/25036473-1-2.jpg)
Bonhams : Gruen. An unusual and rare 10K gold filled manual wind drivers wristwatch 'Batwing' Curvex Precision, Ref 440-641, Circa 1940
![Bonhams : Gruen. An unusual gold plated manual wind curved rectangular wristwatch Curvex Precision, Ref 280-330, 1936 Bonhams : Gruen. An unusual gold plated manual wind curved rectangular wristwatch Curvex Precision, Ref 280-330, 1936](https://images1.bonhams.com/image?src=Images/live/2021-08/06/60139948-1-1.jpg)
Bonhams : Gruen. An unusual gold plated manual wind curved rectangular wristwatch Curvex Precision, Ref 280-330, 1936
![Gruen 1930's Vintage Gruen Pentagon Verithin Precision 14K... for £1,234 for sale from a Trusted Seller on Chrono24 Gruen 1930's Vintage Gruen Pentagon Verithin Precision 14K... for £1,234 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/28259637-gmudcfb4sd1hup6k3vbsaqcd-ExtraLarge.jpg)
Gruen 1930's Vintage Gruen Pentagon Verithin Precision 14K... for £1,234 for sale from a Trusted Seller on Chrono24
![File:Vintage Gruen Veri-Thin Men's Wrist Watch, 17 Jewels, Case Made In USA, Swiss Movement, Circa 1940 (35425955401).jpg - Wikimedia Commons File:Vintage Gruen Veri-Thin Men's Wrist Watch, 17 Jewels, Case Made In USA, Swiss Movement, Circa 1940 (35425955401).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/9/9a/Vintage_Gruen_Veri-Thin_Men%27s_Wrist_Watch%2C_17_Jewels%2C_Case_Made_In_USA%2C_Swiss_Movement%2C_Circa_1940_%2835425955401%29.jpg)
File:Vintage Gruen Veri-Thin Men's Wrist Watch, 17 Jewels, Case Made In USA, Swiss Movement, Circa 1940 (35425955401).jpg - Wikimedia Commons
![Gruen 1947 Veri-Thin Precision Wristwatch Swiss Cal. 425... for £319 for sale from a Trusted Seller on Chrono24 Gruen 1947 Veri-Thin Precision Wristwatch Swiss Cal. 425... for £319 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/29093638-1x6x9emosalkd4zvl683oo7k-ExtraLarge.jpg)