help to identify maker mark on brooch back

[sillysilver]

I need help trying to figure out whose mark is on this brooch. It is stamped 925 sterling silver. Owl head. I would like to get some background on the piece. thx in advance.

[dragonflywink]

Unger Brothers: http://www.925-1000.com/ax_UngerBros.html

~Cheryl

[sillysilver]

Thanks for quick response Cheryl. I looked at that page a few days ago and saw a resemblance but those marks have a V on the tip of the U which I thought may be significant to another artist. Any ideas how I can find out what years Unger Bros changed marks etc?
THX!!