Coming undone. [rusty rings]

Outside the blacksmith shop at Hopewell Furnace National Historic Site in Elverson, Pennsylvania.  

Technical Details:
Nikon F2 Photomic 35mm film camera.  Nippon Kogaku (Nikon) Nikkor-S Auto 50mm F1.4 non-AI lens. 
Kodak Tri-x 400 B&W film shot at ISO 1250.
Developed in Diafine for 4 minutes (part A) and 4 minutes (part B) @ 20 degrees Celsius in Paterson 3 reel tank.  5 seconds initial agitation with swizzle stick followed by 5 seconds of additional agitation evey minute thereafter. 
Negative scanned with Epson 4990 on holders with ANR glass.