For sale, a set of 8 (eight) 6.5 Inch Butter Spreader Knives, made with Sterling Silver in 1955 by Reed & Barton.

Set includes:  8 Sterling Silver Dinner Butter Spreaders and silver cloth wrapping by store
Length:  Each knife measures 6.5 Inches long
Hallmarks:  Reed & Barton (Designer company), Sterling (92.5% pure silver), Mirrorstele (blade is made with stainless steel)
Width of knife, very rear end:  21 mm
Width of knife shaft, narrowest part:  9 mm
Width of knife shaft, widest part:  15 mm
Monogram:  None of the knives are monogramed.  
Weight:  Each knife weighs 48 Grams, for a total of 384 Grams for the 8 Knives.  
Silver cloth:  Blue, Stix, Baer & Fuller Silver Shop, Saint Louis, Missouri.  
Details:  The handles are made with Sterling Silver, the Blades made with Mirror Stele (Steel). 

Obviously this is rather rare to find a set of 8 Butter Knives in one go.  Comes with original store-bought silver cloth.  Perfect as a gift, for the collector of vintage and rare items and / or for the silver investor.