[quote author=2F383921283F3E3F2C232A283F3E4D0 link=1377102600/0#0 date=1377102600]I believe "No-Drill" is a relatively modern term applied to 'after-market' sights that did not require drilling & tapping of the Krag receiver (no gunsmith services needed to install).  It is good to recognize these sights, on altered or 'sporterized' Krags, in order to assess value and collectability.  (Extra non-arsenal holes lower the collector/salvage value).  The "no-drill" Krag sights commonly encountered are:  Model K1 Pacific, Model K2 Pacific (micrometer adjustments), Redfield No. 102K (Krag) and Redfield No. 70K (micrometer with either H=hunter or T=target knobs).  (Be advised that Redfield and other makers also made sights for the Krag that required drilling & tapping).  "No-Drill" sights routinely show up at gun shows, on ebay, and gunbroker.  If purchasing a Redfield model, make sure it has the longer than standard (replacement) side-plate screw or else you will have to make one!  Also, make sure it has the 'bracket' that hooks into the magazine cut-off opening (the magazine cut-off has to be removed for the Redfield and Pacific sights).  {My opinions and noted quirks of these "No-Drill" sights}:  Both of these brands of sights mount securely and work well. 
The Redfield sights as shown do not have a pin as the Pacific appear to do to go into the cutoff area.  Are these sights complete or do they need the same kind of arrangement to mount?