Vintage Barber-Colman Type X100 industrial indicator gauge manufactured in Rockford, Illinois. Features a curved 0–20 scale, precision pointer, green adjustable set marker, and heavy-duty black metal housing. Ideal for collectors of industrial instrumentation, restoration shops, and steampunk/industrial decor. **Features:** - NOS – unused, preserved condition - Original box included - Curved 0–20 analog scale - Green adjustable set pointer - Heavy metal housing with glass lens - Authentic Barber-Colman serial plate **Applications:** Industrial control systems, process monitoring, retrofitting vintage equipment, display pieces, and collector showcases.