Create a detailed black and white vector illustration in tattoo/engraving style showing a horseshoe with a horse's head. The composition should be symmetrical and centered. A large horseshoe forms the frame/border with nail holes visible around its perimeter. Inside and overlapping the horseshoe, draw a detailed horse's head in profile or three-quarter view with flowing mane, showing realistic equine anatomy, expressive eye, flared nostril, and detailed musculature. Behind or integrated into the design, include a second horse head in opposite direction creating a balanced, mirrored or yin-yang-like composition. Both horses should have flowing, windswept manes with individual hair strands. Style: Bold tattoo illustration, traditional Western horseshoe design, high contrast black ink on white background, thick outlines with internal detail work, engraving-style shading using parallel lines and crosshatching. The horseshoe should have decorative elements or floral/scroll details around it. This should look like a classic Americana tattoo flash design or vintage blacksmith shop logo. Pure black and white vector art, no grayscale.