I purchased a pk. of 12rev tooth scroll saw blade's from our local Habit for Humanity ReStore and the top corner of the pk. was cut off.
Here is some info that's on the packaging:
it's blue w/silver top
5'', 11.5T.P.I. 8rev, .047width, .017thick
Universal No. 7R
only info on the back is, Made in Germany,
always wear eye protection when using power tools.
There is also an original price sticker w/date code of 09/18/09, hope this help's.
I paid a dollar for the pk. and they had about 12pks.