diggerbut and epackage,
Thank you for your informative replies, I'm new to this avocation, so I am relying on my background (mechanical engineering) to get a relative feel for the age of this artifact. If you compare the photo of my seal and the one supplied by diggerbut, there are differences due to the manufacturing process. Most notably, the non-uniformity of the border and depth of the imprint, causing the circle of dots to only be visible in the top half of my seal. Diggerbut's seal image is very uniform, which says to me that it is likely machine-made, or at least made with the assistance of an alignment fixture. My seal appears to be hand-made, hence the poor alignment of the imprinting tool. Also, the presence of more detailed features (grapes and vines, in this case) is usually an indication of a more modern example. Therefore, the seal that I found is likely older, at least in my very inexperienced archeological opinion. I would be interested in your response to this theory. Thank you, Rich