Here are two unipart Fred Locke U-964b's these are the non-glazewelded version of the Locke #100. These were catalouged in 1902 only as "made in one piece" and later as "made in two parts glazed". The specimen on the right has marking 6-1and the left one has no markings. The unit on the right is a new addition to my collection. Even tho it is chipped up, it is in fairly good shape otherwise!! These are much scarcer then the fairly plentiful U-964 with less then a dozen reported so far.