1. We published the 12th Edition because there were so many changes since last year (particularly with the values of more expensive chips) that we felt it was necessary. (Anyone who thinks catalog publishers ever make a profit is dreaming )

2. Knowledge is everything. The 12th Edition contains the most accurate pricing data in any chip catalog produced to date. Any serious collector could easily save the price of the catalog on a single purchase if they have up to date information.

We gave Edition 12 a new cover to clearly distinguish it from past issues.
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