The Brookfield company was actually Bushwick Glass works until the early 1890s.

The bottle hobby currently has listed but one bottle marked by Brookfield, yet Brookfield also was known as one of the largest bottle makers in the East (as per the quotation, "Both Mr. Tatum and Mr. Brookfield, who are among the largest bottle manufacturers in the East..." : American Druggist (New York, New York) July 23, 1900).

At sodasandbeers.com, it can be found the Minck Bros. bottles of this era were Brookfield made, but only the smaller ones are marked BGW. While this website lists a BGW/6 listing, mine is a BGW/4. I know BGW/2 and BGW/3 exist per internet pictures. At present I have seen pictures of two different looking BGW/2 embossings suggesting these are shop numbers and not mold numbers.

So far I have seen or heard of the Quart sized Minck Bros. bottles as having 417, B, or B1 on the bottom (I own a 417).