Catalog
No. 36, Professional Photographic Equipment, Eastman Kodak Stores,
St. Paul, MN, 1936, p.18
The manufacturer of the Packard Ideal No. 6 Shutter was located in Kalamazoo, MI. The manufacturer of the earlier, and very similar, Low Shutter No. 6 Shutter was also located in Kalamazoo, MI. It is not a stretch to conclude that the Packard is essentially the Low, made by the successors of the Low company.
References:
Photography has Made the Sun an Artist, Andrew J. Lloyd (Boston,
MA) catalog, 1899, p.71
Milwaukee Photo Materials Co. Catalogue No. 5,
Milwaukee Photo Materials Co. (Milwaukee, WI), undated c.1907, p.34