Had a Scruggs 21 years ago (that I still regret getting rid of) and I've only ever seen the interlocking "TS." Now, here comes this thing on eBay.
http://www.ebay.com/itm/Tim-Scruggs...993714?hash=item43e6eb5eb2:g:2ykAAOSwLqFV81hr
http://www.ebay.com/itm/Tim-Scruggs...993714?hash=item43e6eb5eb2:g:2ykAAOSwLqFV81hr