1) Collection of Colt blueprints, showing various engraving patterns in a blue box with gold lettered leather plaque reading "COLT FACTORY DESIGNS/ BY CUNO A. HELFRICHT/ FOR ENGRAVING/ SINGLE AND DOUBLE ACTION/ REVOLVERS/ AND/ AUTOMATIC PISTOLS/ C.1915/ (three stars)/ TO BE FEATURED IN/ COLT ENGRAVING - III/ BY R.L. WILSON". 2) Several hand written items of Helfricht's including a timecard for engraving work, work ticket with engraving designs, price sheet, a payment card from the Times Club at Colt's with monograms drawn on the back, blue calling card, a tag for 24k 30 gauge gold wire, time ticket with a side plate design on the back, payroll envelope dated march 10th, 1889, monthly statement from Young Bros. engravers, and picture of these and other items on display. A series of correspondence concerning these items as well. 3) Pair of framed items. One a portrait of Helfricht, the other a letter from R.L. Wilson detailing the transfer of some of Helfricht's personal items (some of which are included in parts 2 and 5 of this lot.) 4) A pair of leather-bound books titled "CUNO HELFRICHT" in gold lettering containing scroll patterns, monograms, crests, and other designs. Very good. 5) A set of engravers tools including chisels, sealing wax, brass plaque, dies, brass headed hammer, and more.