I had some time to tear into it this morning and wanted to share what I found.
Heres a picture of the hole pattern for the strainer. My WFL and RK 3 hole strainers are too short between the top and bottom holes.
The hole measurements are 1 3/8" between the top pair and 2 3/4" from the top pair to the single bottom hole. (8/4/12 edit, I got those measurements wrong, actual are 1.75" center to center on the top pair of holes and 2 5/8" from the top holes to the single center hole on the bottom)
[IMG]http://i169.photobucket.com/albums/u216/46chief/soundking/IMG_1012-1.jpg[/IMG]
The butt plate is 1 3/4" between the holes (edit: Butt Plate is also 1.75")
Something interesting about the lugs. The ones off this drum were installed with two washers, one like the washers on the inside of wood drums and one with the machine screw that bolts the lug to the shell.
The top lug in the pic is one off my 70's COS snare I stripped. the lower is the one off this COB shell. The two lugs are different too. the COB one has casting marks on both ends and feels lighter. The newer lug off my COS shell doesn't have the cast marks feels a tad heavier and is a little thicker in the waist/middle of the lug. It's hard to tell in the pic because of the glare.
[IMG]http://i169.photobucket.com/albums/u216/46chief/soundking/IMG_1018.jpg[/IMG]
I also searched through the gallery for similar shells and found this one. Is this the correct strainer?
[IMG]http://www.vintagedrumforum.com/attachment.php?attachmentid=16718[/IMG]