2x Old Antique Quick Release G-Clamps C.1872 - 5"2x Old Antique Quick Release G Clamps C. 1872 5" These lovely old, unusual early G Clamps date to the Victorian era, they have an early quick release design and are marked with a patent date of 1872 (one can clearly be seen the other has pretty much worn). This is the first time we have seen these. Condition: all parts move freely, please see photos for condition.