That Delta Elite is probably older than she is.
Actually- assuming that the grip panels and beavertail safety are as-is from the factory, Colt didn't offer that configuration until recently. The DE I picked up about 15 years ago or so resembles the picture @Slash0311 posted with the standard beavertail safety and wraparound grips. And that ass is certainly older than 18.
Given the rules of this thread and that I said 'beaver' twice I feel obligated to include the below image.
-LD