Hey bessie, That's a decent lure from the 1950-60's you have there. They come from several different makers, several colors, a bit different configurations, and different sizes. There are guys who have complete collections of the different "mermaid" lures out there but i only have one, it is the smallest one that i've seen, maybe 2-3" long max, and it's still in new condition in it's original box.
The one i have, i paid about $40. for thinking it too good a deal as the box and condition warranted my picking it up at that price. I see lures like you have there go from $10-40. but i don't follow them too much, some colors or other distinctions might be more or less in value, as they are more of a novelty type thing than a fishing bait.
Don't fish it but it is a pretty cool thing to have in anybody's display shelf or tackle box!!
Joey
"It's all about knowing what your firearms practical limitations are and combining that with your own personal limitations!"