No Hand Ejector S&Ws are classified as antiques. Some .32 Hand Ejector 1st Models were made in 1896-1897, but they would be 12(6) because they are .32 S&W Long calibre. These are the predecessors of the I-Frame, which was the small frame Hand Ejector prior to the advent of the J-Frame in the 1950s.
The K-frame (M&P 1st Model) was first manufactured in 1899 for .32-20 and .38 Special. The N-frame (.44 Hand Ejector 1st Model) was first manufactured in 1907 for .44 Special. This was the famous "Triple Lock".
The .455 Hand Ejectors were built during WWI for the British and Canadian forces. Approximately the first 6000 built in 1914-15 were the Triple Lock in .455 Webley. This was soon superceded by the 2nd Model, which deleted the ejector rod shroud and the lockup at the cylinder yoke in the interest of lower production costs.
The Model 1917 was a 2nd Model Hand Ejector chambered for .45 ACP, not .455 Webley.