It appears you paid a good price for it.

This drum is from approx. 1972-73 as it has the later Fullerton era bottom hoop that was one of the major changes to the Dyna-Sonic during that era, 72-75. Many people equate this hoop with the Big R era, however, it is indeed a 9/72 era change. The snare frame would be the later, classic Big R style frame (again, this was a 9/72 era change). Your Swivomatic Elongated throw off can be easily replaced with an era correct piece. This would be one without the D stamp, having a solid top knob on the shaft. The shaft itself could be replaced by a shaft with knob from a dampener, if you have one laying around. Cost can be from really lucky to approximately 130 for the frame and replacement wires, and 50-75 for the throw off as a complete unit. The third major change to the Dyna-Sonic, and to all drums during the period was the C-Clip lugs. That happened after your drum was built, but prior to the introduction of the Big R era in late 75.

There are good sellers with parts that did not come by means of a drum wreaking yard. I really hate to see good drums in near perfect condition stripped down just to sell parts. I personally do not buy into the logic of saving a dozen drums that are missing a single part by destroying a perfect drum that in reality is a collector grade piece on its own.

There is some difference between the sound of a five liner and a seven liner. Shells in a seven liner are slightly heavier, the lugs are heavier with more mass, the hoops style slightly different. Functionally, and quality wise, there is no discernible difference between the two.

Thanks John, much appreciated and, as always, everything I need to know.

BTW the seller accepted my $165 bid.