拍品專文
                                See W. Reid The Fire-arms of Baron Herteloup The Journal of The Arms & Armour Society, volume III 1959.
J. Sigrist patented his self-priming underhammer action in Belgium on the 28th March 1843; it closely resembles that of Baron Herteloup's British patent of 1841. 
                              
                        J. Sigrist patented his self-priming underhammer action in Belgium on the 28