Wray,
First, on the blade steel: If you look-up old posts, this subject has been covered in more detail. Buck knives were made with 440C until approx. 1982 when a switch was made to 425 modified.
During the urban cowboy craze of the early 1980s, Buck came out with the tooled aluminum handled Classics. The 111 and several other models were offered. They were pretty, but the soft aluminum did not hold-up well to heavy, or even moderate duty
carry and use. The other models were numbered 510, 513 and 515, if my memory serves me correctly. I do not have my resource info with me and so this is strictly from memory. In recent years, Cabela's has had a 525 with the same type aluminum handle frame offered as a Buck special project.
If you are a BCCI member, you can obtain copies of all the old club newsletters. Vern Taylor has written many informative articles over the past 12 - 13 years and the Classics have been included. You can obtain the club newsletters for a very small fee and they are a treasure trove of information. I am sure I have read and re-read mine some 30 - 40 times.
Hope this is helpful.
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"He is no fool who gives what he cannot keep to gain that which he cannot lose".