It might be a Brunswick pool table, but the rail bolts coming up from underneath isn't typical from what I know of old Brunswick pool tables.
If you head to their website, they have archives with 100s of old brochures and catalogs. I've been through them all many times over, and I don't recall this style. It takes some time to go through them all, so you might want to have a second look there. It could just be a bad memory on my part.
But definitely the rail bolt location will be a good place to start searching. The "up from underneath" style wasn't as common (as was the style where they went in horizontally from sides).
UPDATE: Wait, I stand corrected!
Upon a closer look at the photos, I see the rail bolts do in fact go in horizontally.
Your pool table is a Brunswick-Balke-Collender "Baby Grand" pool table, manufactured between 1914 and 1917.
Here's the technical information from Pg 62 of the 1916 Brunswick-Balke-Collender "Billiard Products Catalogue":
Brunswick Baby Grand Pool Table
- Year of Manufacture - From 1914 To 1917
- Sizes available:
- 6 Foot options (32" x 64" Playfield)
- 7 Foot options (38" x 76" Playfield)
- Color Options: Mahogany
- Design patent awarded May 7, 1912.
The Brunswick "Baby Grand" Home Table, carom and pocket billiard, genuine mahogany, inlaid design, richly finished.
These home size tables belong to the "royal family" of billiard tables. They are worthy productions of the "House of Brunswick" and are daily adding new luster to its name. Made of the finest, thoroughly seasoned mahogany, beautiful in design and very richly finished.
This rare and beautiful wood possesses the extreme durability so desirable for the finest class of cabinet work. Mahogany lasts for generations. Age serves but to enhance its richness and beauty. We are among the largest buyers of Mahogany in the world.
We operate nine factories in various cities. Our immense manufacturing facilities, great buying power, and vast output, enable us to sell these magnificent tables at extraordinarily low prices.
The cue rack and accessory drawer of Brunswick's Baby Grand Carom and Pocket Billiard Table is a great convenience. Keeps everything right at hand and in perfect condition. The drawer is constructed so as to be invisible.
All Brunswick home carom and pocket billiard tables are fitted with Monarch Quick-Acting cushions. These celebrated cushions are the same quality as used on our standard size tables. They are guaranteed as to accuracy, speed and durability.
This pool table model was advertised heavily. There were a ton of ads run in the Saturday Evening Post and many other big publications of the day.
Here's an ad from a National Geographic magazine:
Here's the full page brochure image (carom version) from the 1914 Brunswick-Balke-Collender mail-order catalog: