VPRS 6981 Register of Diamonds Used in Drilling Operations in Search of Gold and Coal Deposits [RECORDS DESTROYED]

This series consisted of a single volume which was documented the use of diamonds in drills used in drilling operations searching for gold and coal deposits.  The register recorded the number an size of bit, date diamonds were sent to the drill, number and weight of diamonds sent to specific drills and the date, number and weight of diamonds returned to the department after use. The latter date was not always recorded.  The series was appraised as being of temporary value and was destroyed during 2000. This series was, at one stage, inaccurately titled as a register of diamond drills.

本系列仅包含一册档案，记录了用于金、煤炭矿床勘探钻探作业的钻机中金刚石的使用情况。该登记册记录了钻头的数量与尺寸、金刚石送达钻机的日期、发往特定钻机的金刚石的数量与重量及其配发日期，以及使用后交还至相关部门的金刚石的数量与重量。该交还日期并非均有记载。本系列档案经评估仅具有临时保存价值，于2000年被销毁。该系列档案曾在某一阶段被误标注为“金刚石钻机（diamond drills）登记册”。