Rare "See Through Crystal Back" on a 17 Jewel French "Gervais Penard" Watch with illuminating Hour and Minute Hands !!! Model llU488 is Working & keeping Accurate time.
Two Sided Crystals are Good for displaying the working movement, or simply a novelty for your collection.
Front Crystal has normal surface scratches, back Crystal is in very fine addition with a pristine visible movement.
Specifications : 17 Jewels, Shock Absorbing, Waterproof, Open Thru Crystals 902. 9045 (back) . "Base Metal" shown with opposing triangles & central dots. Case measures 1 5/16 inches in diameter.
No wristband included, but the Ryker case shown in the last photo, is included for display purposes.
Sorry for the lack of a Macro-Lens, but I took the photos with, and without using Flash for better internal & external details.