This is the Holland Cycles frameset as shown. Holland Cycles is a boutique bike manufacturer owned and operated by Bill Holland in La Mesa, CA (San Diego). They make just under a hundred bikes per year by hand in their facility. The current price for this equivalent frameset is 6500 dollars plus tax with lead times of 4 to 6 months. This one comes with a Chris King headset (the only one they use) and is set up for either road or gravel bike service. The brake bridges are wide enough to allow a massive 38mm wide tire, if that is your bag. We ran 32mm tires with tons of clearance. Most recently we used it as a road bike, and it was perfect as a road bike also. It is built for disc brakes, and it uses QR axles front and rear. Holland owners are raving fans, so if you are considering please check the internet for reviews. It has light scratches and rubs, but overall it looks fantastic. It is a real work of art. I am listing it as a 54 cm which is the effective top tube measurement. I have posted an image of the original CAD drawing of the frame so that you can get all the dimensions you need. If you buy the frameset, I have the set of Mavic Open Pro Disc wheels that we were last using that you can buy for an extra 500.