These were made by K & E, the survey equipment guys. There are two of these heads with heavy duty bases and the meter box.
They have long cables to connect to each other. The slotted cup has some lenses inside and a light bulb. Very heavy. Any clue?Click image for larger version.  Name: DSCF7122.jpg  Views: 48  Size: 241.4 KB  ID: 31999Click image for larger version.  Name: DSCF7125.jpg  Views: 47  Size: 205.2 KB  ID: 32001Click image for larger version.  Name: DSCF7129.jpg  Views: 45  Size: 249.0 KB  ID: 32003