No, apparently most of them were done throughout
the 50's! The heavy vibrato was characteristic of big bands and
jazz.
M1 sounds would have been recorded late 60's wouldn't they?Internal Virus Database is out-of-date.
Checked by AVG Free Edition.
Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: 22/07/2007 7:02 PM