I did a Google search for "Buchanan Hammer" and took my info from: http://www.namm.org/library/oral-history/don-kirkendall Tom Osenkowsky, CPBE > I don't think the 644 was the one. It is a needle- > nose, "Sound Spot" microphone > George discussed the 664 as the original > "Hammer" in his article in Radio Guide in > September/October 2008.