No monogram. Victorian Silverplate Aspic Server or Jelly Knife.  Could also be used as Pie Knife, Cake Server or Fish Knife. 

The rare art nouveau pattern is Royal Oak 1906 by Paragon Silver Co.

Marked:  PAT. '06 PARAGON DOUBLE TRIPLE

Measures approximately 8 3/4" long. 

Aspic servers are Victorian serving pieces used to serve aspic, a clear tasteful jelly that is made from broth. Generally, aspic is used to accent the serving of meat. Aspic is similar to cranberry sauce.  The shape is similar to a narrow cake or pie knife.  Also known as a Large Jelly Server.

In good vintage condition, shows normal age and usage wear, including some tarnish.