Large Old Unmarked 'Butter Knife', Very Sharp

The blade is carbon steel, the grip silverplate on brass. The fancywork at their joint is designed to keep the blade off the table, as the grip is heavier. The edge isn't so much sharpened as wedge-thinned to a cutting fineness, an' that sharpness extends throughout the end radius to the spine, then gets thicker to the heel; from ~0.020" to ~0.075". Overall length is 10", blade is 5 1/2" by 15/16".
Can any of y'all say if this pattern/style is European or American, an'/or when it was popular? I've put quotes around butter knife because smaller, an' much duller blades of similar pattern are familiar to me for table use in slathering butter on bread, etc...but the cutting edge is a puzzle. Thanks for lookin'!

 

possibly sharpened for a different purpose than butter......
may have even been a steak knife..!

 

Overall it looks to me like an ordinary table knife. Perhaps someone sharpened it for their own purposes?

 

I've failed to describe it adequately, folks; this blade was made sharp initially. The spine-to-edge taper has no 'edge' in the common sense of an applied grind; the taper ends at the edge, without having a sensible 'applied' edge finish. I've eyeballed it with a 10X triplet...there is zero evidence of a grind there. Added to that, it's carbon steel; over the time since its manufacture, it has been exposed to water, sufficient to slowly but surely degrade its original sharpness. It has a few very minor nicks...but would do good duty as a steak-slicer still!

 

Possible match, but this ones marked-so perhaps not a perfect duplicate ?
https://www.worthpoint.com/worthopedia/vintage-polish-fraget-gerlach-10-1977836526

 

This knife could have been used for things we don't normally eat any longer. Or something that is no longer served the same way. Like, for instance, a bird knife. I was researching a bird fork I found once (in sterling) and read that whole birds were served at the table. I was imagining maybe passenger pigeons but I don't know how large they were. Other birds like small wild game birds maybe? Seems a little long for birds.

It could be for a steak or pork chop in times when they were still tender? My feeling is that if you have to saw at meat (like with modern steak knives), it isn't worth eating. Best guess on this is a meat table knife late 1800s to early 1900s. But that just a guess.

@Bronwen may be right saying table knife. One this sharp though seems like it's for a special purpose.

 

So very close...an' the blade pattern is spot-on, Bosko. Thanks!

 

My pleasure Whit-why there'd be unmarked ones beats me ?
Good Lord-the Robot had a lot to say-
"It was very common during this era for prominent silversmiths to manufacture the ornate handles while outsourcing the functional cutting blades to master cutlery smiths.

The Maker Marks Decoded

• "J. Fraget Varsovie" (or W Warszawie): This identifies the producer of the handle. Founded by French jeweler Józef (Joseph) Fraget in Warsaw in 1824, Fraget became the premier manufacturer of high-quality silver and silver-plated goods in Eastern Europe. They were suppliers to European aristocracy, luxury hotels, and the Russian Imperial Court.
• "Gerlach": This identifies the producer of the blade. Gerlach is Poland's most famous and historic cutlery manufacturer, founded in 1760. Because Fraget specialized in silver-plating softer base metals (like copper or alpaca), they commissioned Gerlach to supply the hardened carbon-steel blades for their dining knives.
• The Crown Mark: In 1829, Tsar Nicholas I of Russia visited Warsaw, was highly impressed by the premium quality of Gerlach’s craftsmanship, and officially granted the company the prestigious right to feature the royal crown in their hallmark. This crown mark became a permanent staple of Gerlach’s brand identity.

Why is the knife blade "unmarked"?
If the handle is clearly stamped but the blade itself doesn't bear an independent mark, this is standard for several reasons:

• The "Master Brand" Rule: When Fraget sold full flatware sets, they were marketed strictly under the luxury Fraget name. Gerlach acted as a sub-contractor supplying raw blanks. Fraget often requested the blades to remain blank so as not to clutter the design or detract from the main Fraget brand registry.
• Cleaning and Wear: Over more than a century of use, carbon steel blades require aggressive polishing, sharpening, and scouring to clean off rust and tarnish. Lightly etched or stamped maker marks on the thin steel blade face routinely wore off entirely, while the deep stamps on the heavy silver handles survived.

Historical Context & Value
Because Warsaw was part of the Russian Empire during the 19th century, Fraget's luxury items frequently bear a mixture of Polish, French, and Russian Imperial stamps (sometimes featuring a double-headed eagle alongside the crown).
These hybrid Fraget-Gerlach pieces are highly collectible specimens of industrial-era European metalwork.

 

Most interesting, good Sir...Thanks!

 

Think nuttin' of it. You'll have a History Doctorate by the time you finish bird-dogging this flatware !

 

Ditto. My grandparents had similar ones in the kitchen drawer, banished after the knives were replaced by a full Christofle set. That side of the family is mostly of Dutch-German-French-Belgian origin, so take your pick.

Exactly, unmarked. Also the handle and ferrule are different (devil is in the detail) so there is no reason why whit's knife should be by Fraget.

Unfortunately that isn't proof. There are still the other differences.

 

Whit's knife:



The Fraget knife (I flipped the photo to get a better idea of the differences):



Note the three rings as opposed to the single one on whit's. Also the position of the rings is different, on the Fraget knife they are closer to the blade.
The ferrule, the bit between handle and blade, is shorter on the Fraget knife.