This older gear appears to be unused in excellent cosmetic condition and good working order. it marks: Davis & Sanford System, Tiffen USA, Model SH200S 4X5 Head. the bottom diameter is about 47.1mm.

It is a supremely heavy-duty three-way pan/tilt head designed for large format cameras and has large camera platform, 90° downward tilt adjustment. 

Head Type Pan & Tilt Head
Base Mount 1-7/8" Clamp
Camera Mounting Screw (1/4"-20) Male
Quick Release Plate Type No Quick Release
Load Capacity 35 lb / 16 kg
Number of Bubble Levels None
Friction Control No
Independent Pan Lock Yes
Dimensions 10.2 x 8.5 x 6.7 inches
Weight 2.8 lb / 1.2 kg

Please check out the series of photo for detail cosmetics condition! you will be getting exactly what you see in those photos. I also offer returns, so you are safe!
I do combine shipping if you order more than one item.
Thank you for looking! good luck on bidding!
Please take a look at my other items for sale. As always, I guarantee satisfaction. My 1st concern is keeping my customers happy and my feedback positive. 
if you have concerns, please contact me first before leaving feedback, you will find me to be very workable.