Hi, Pat. Have handled several pieces in this pattern over the years, with some variants and different backmarks. Schofield called the pattern 'Hand Chased Rose' even though it was die-struck, referencing the original Klank pattern, which actually was hand-chased (though they also made a die-struck version), Stieff called it 'Baltimore' - from what I can make out in the pic, yours appears to be 'channel-back'. You'll find a good bit of information on Scott Perkins' Stieff research site (suspect he'd like the images of your piece):
'Baltimore' aka Channel Back ~Cheryl