Good button… but just a few additions/corrections needed here.
The maker is Trelon, Weldon & Weil of Paris which, as a partnership, was formed on 1st January 1845 when Louis Weil joined Henry-Marsch Weldon and Nicolas Trelon. The business was formerly known as ‘Trelon and Langloi-Sauer’ (established 1835) and was then joined by Weldon in 1841 before becoming TW&W. In 1865 TW&W became TW&W HM (Trelon-Weldon-Weil, Hartog and Marchand) and then renamed to ‘Coinderoux’ in 1904.
The TW&W marks are the anchor and, not an octopus, but a ‘flaming bomb’ (grenade).
The 1845-1865 date (or even to 1904 as TW&W HM) means it’s not ‘Czechoslovakian’ as such since Czechoslovakia (under that name) didn’t exist until October 1918 following the collapse of the Austro-Hungarian Empire at the end of WWI. Prior to that the region comprised Bohemia and Moravia (sometimes called the ‘Czech Lands’) in the west, plus Slovakia (as part of Hungary) in the east.
