this is 13570, thanks louis

F.v.Dreyse Sömmerda , SN 26991
It is operated with a bottom lever which swings the barrel to the side for loading. The overall length is approx. 15 5/8"". The approx. 8.75"" swamped octagon 37 caliber (marked Cal. 9.5mm 2/24P inside the action) rifled barrel has a fair bore with areas of pitting. However, this doesn't matter much as the pistol is fitted with what appears to be a 22 caliber chamber insert for parlor shooting. There is a blade front sight and an adjustable notch rear sight. The top of the barrel is marked F. v. DREYSE SOMMERADA (factory name and location). The pistol cocks on opening. The only other marking are the serial number, 26991, located on the top grip tang and barrel bottom and crown over V proof marks at the breech. The barrel and action have a smooth blue-brown patina with light mottling. The spur trigger guard and operating lever have a gray-brown patina. The rear of the breech has two silver bands with silver scroll inlay forward of that. There is decorative engraving on the barrel latch escutcheon, https://www.gunsinternational.com/guns-f...un_id=101636564

0,34" SN 8005 https://www.egun.de/market/item.php?id=14009628