This is a classic heavy duty mount built by Bill Schaefer himself. I used it for several years to carry a 50 pound 12.5 inch Newtonian with no problems. The previous owner said he had a 90 pound Cassegrain on it.
The dec assembly detaches easily from the RA assembly so it is a "luggable" mount. Dec assembly weighs 54 pounds and has a tangent arm drive. The RA assembly weighs 46 pounds and has a very nice 10 inch Byers StarMaster drive with a stainless steel worm. A Lumicon drive corrector is included. The three cast-lead counterweights weigh 25 pounds (2) and about 8 pounds. The tripod is built from wood and angle iron and can easily support more than 200 pounds. The legs conveniently fold in for transportation.
Prefer San Francisco Bay area delivery, but can meet halfway in California.