Great guns so far!!! And please feel free to post ANY M&P Target that shipped pre WWII (which would include all those beauties shipped pre WW I).
Note: those RB 1902 Targets are way cool (I would love to own one of them).
My earliest two are 154998 and 158135 - both shipped in 1910 with 6.5" barrels.
154998 (Aug 1910) has a checkered trigger and a frame mounted trigger stop. At some point the barrel was swapped, as the barrel is SN 165183. This gun was a shooter for someone.
159135 (October 1910) is more "traditional" for the period.
Let's keep 'em coming