a collection of Heddon lures
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As early as 1904 Heddon was offering lures in rainbow, color code 01. Several variations of rainbow were used over the years.

a very early version of rainbow, c.1904

The 1905 version of rainbow

The 1908 version of rainbow

brown back, orange & yellow sides

green back, pink & yellow sides

green back with green eye blush

No. 9100, Super Dowagiac Spook c.1930 and No. 9100, Dowagiac Spook c. 1946. Both have black backs with black eye blush.