I only know about the Declaration line, but from what I have read and seen in original catalogs, the set of numbers with hyphens is the product number. I believe the first 3 digits define the set it belongs to (bedroom, dining room, etc), the middle 3 the specific piece (end table, hutch, etc) but I am not sure about the final digits.
The other set of numbers is the date of manufacture expressed in month and year.
Nowhere! Serial number apply only to articles produced in quantity, their purpose is for traceability and identification. Serial numbers are a very modern thing, a sure way of telling that you have a fake and not an antique.
G9730255 is not a complete serial number for an antique Singer sewing machine. The serial numbers always start with two letters, which are used to identify the year they were made.
Yes, depending on who made it and if records survived.
furniture serial
They are most likely a manufacturers mark or perhaps a product serial number or sorts.
It's possible that pianos of the era didn't have serial numbers.
Furniture has a serial number in order to keep track of what model that is currently being used by the customer. One can find the furniture serial number by simply looking on the box of the furniture.
Impossible to answer with just the serial number.
There is a strong likelihood that it does not have one. Serial numbers were not required by law on rifles and shotguns until 1968. If the shotgun is a muzzle loader that uses loose powder and shot, it is considered an antique firearm under Federal law, and is not required to have a serial number.
What is Value if antique us spring field rifle model 1884 serial number 517233
Old furniture often doesn't have a serial number, and it probably wouldn't help much in finding the value anyway. If the particular piece you're talking about does have a serial number, it might be a shortcut to figuring out how old it is, but that by itself still doesn't tell you what it's worth. Best option is to go to an antiques dealer for an appraisal.
I am sure the first rifles made using black powder did not have a serial number engraved. Antique rifles without a serial number do exist. I am however unsure what the law state about collector pieces. Logically one can not force a serial number onto a piece that originally was made without one.