Thank you. Just trying to do some research on something I stumbled on since i became a collector and seller. The silver engraved units appear in the 2600, 3400, 4000, 4300-4400, 4600-4700, 4900+ range. Although it appears like there are a lot of silver engraved units many of these gaps are very small. All said and done the Silver engraved numbers are probably only between 12-20% of the total of 4,000 or 400-800 total units. The Champagne engraved units are def'n more numerous.
Most Audiophiles do not know much about the Silver engraved units. Many ask what the difference is, or think any 2270 with a Silver faceplate is an engraved unit and worth a mint. Other issues i have come across is finding regular 2270's with an engraved faceplate that is obviously not correct (chassis and other known ways to check are not correct). My other problem has been some owners have sent me photos that are so bad i cannot tell what they are and as a result i cannot use them in my survey. Fortunately, this site has been really good with providing information. E-Bay (love it or hate it..lol) has been my best source.
If i get bored maybe I'll research how many 2285B's have the Black European model faceplate (also own that one!). Any how thanks for the encouragement from all of you!