2c Washington 1908-1920 - Which Type?

The number of variations on this stamp has me baffled. I have two blocks (NOT plate blocks):

5x2 from left side of a sheet
5x3 from lower-left corner of a sheet
(It's possible they were attached to each other at one point...I got them from my father-in-law as two blocks.)

My scan is a 600 dpi of one of the stamps in the 5x3 block. (I could scan at 1200 dpi, but the image would be to large to upload here.).

Is it possible to get some help IDing these from the scans?

Thanks

You can learn more about IDing your stamp here
http://www.stampsmarter.com/1847usa..._03main.html

Don

Your stamp is an Offset 528B ~ Type VII

disi123...

Thank you very much. As I said I have two blocks 5x2 and 5x3...total of 25 stamps, all OGNH. Not sure if this is the place to ask this...if npot, I apologize, but...any suggestions on a good venue for selling the two block?

ssander