I agree with the comments by
@cristos71.
The clock you show was produced in 1928. The calibre is the Omega 59-8D (which started life in 1926) – in this example with 7 jewels (from about 1930 they had 15 jewels). The 59-8D was the main Omega calibre for ‘larger’ products for over 20 years and was fitted in watches and clocks of all kinds (both stem-wound and key-wound - like this example).
Many (thousands) of clocks like this were produced from 1927 until about 1930 - it was the style of the period. The clock shown was the largest offered (20 x 25 cm) and had the Omega reference 17.010. Other sizes offered ranged from 10.5 x 15 cm, 15 x 15 cm, 20 x 20 cm – with the smallest being 12 x 12 cm. There was a wide range of styles: variations of frame, dial, numbers and hands. As we see, this clock has gilded, raised numbers on a nickel dial – and the style is listed as ‘Cadran H’.
The case marking is a dove with an olive branch – which was the registered trademark of the “Fabrique de Boites La Centrale” in Bienne (Omega’s home town). La Centrale was set up by the Louis Brandt organisation to make their watch cases. More about this is available on David Boettcher’s website as follows:
https://www.vintagewatchstraps.com/swisshallmarks.php