This is a 18 size, Dueber Watch Case Co., "Dueber Special", Engine Turned, 14K, Gold Filled, Hunter Case. 

Front has a nice Floral Engraved, Shield. [pic's shot in low light to cut down on the glare but Case probably needs a good polish].

Back is completely Engine Turned. The 'Fob' has 3 Chain Links, intertwined, which would be for a member of the "Odd Fellows" Lodge. 

Inside Case Back is the "Dueber Special" Shield & Anchor T.M. which means it's 14K Gold Filled, Warranted to Wear for 25 Years.  

Inside Dust Cover is stamped "Warranted <Dueber> 25 Years. Update; After polishing Case it went from looking like a Dull Rose Gold to a Bright Yellow Gold.