I assume this is the drum?: http://cgi.ebay.com/Vintage-Gretsch-Old-Wood-Snare-Drum-Parts-or-Restore_W0QQitemZ230172439032QQihZ013QQcategoryZ38095QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
You didn't keep it long!
It looks nice...
3 extra holes - looks like someone replaced the microsensitive with a Slingerland 3 point strainer. The rims are not die cast, and not original, neither are the tension rods. Nice looking shell though - I bet you make at least $50. If there is a date stamp you may want to include a picture to help the sale.
PM just means Private Message - you can view these by clicking on the link on the right side of the screen.