It is a No. 100 Heddon Dowagiac Minnow made from 1905 to about 1943.
Yours was made from 1905 to 1915 due to the cup hardware. The color is fancy sienna or brown crackleback.
This early 3 hook minnow sinks (underwater model) and is one of the most collected lures. They are the epitome of lure collecting.
Clean lightly and find a beat up model to replace the eyes.
Current collector value - Excellent condition $200 - 300
Good " $100- 150
Average " $50 - 75 or less
If you have any more questions please ask - I identify, buy, sell and appraise lures, reels, rods, tackleboxes, catalogs, artwork etc