I was able, with some assistance, to find the information on the builders plates at the Lomita Railroad Museum and one of them is from the OAHU RAILWAY & LAND outside frame 2-8-2 #60. As has been discussed in other posts on this forum, this locomotive was a near identical twin to the K-28's with the major difference being the placement of the air compressors on the fireman's side instead of the front. The plate is numbered 66279 and is dated March 1925. The plate is painted black with silver lettering. I am very glad I dug deeper on these plates with a find such as this.
While not narrow gauge there were also three cab forward plates, a plate off of the only surviving SP 4-10-2, two AT&SF 2-10-2's, two SP mountains and various other engines.
Daniel