3D printed model file of an antique surveyor's telescopic Alidade. It is scaled at 1/4 size download file in STL and OBJ. It easily scales down to train modeling size for the diorama. Similar to the archaeologist instrument in Raiders of the Lost Ark or military, archeological and geological survey, road construction, nautical, etc. You are purchasing a 3D print file.Note: Tripod3 has been added for smaller models. Tripod3 has thicker legs to support smaller prints. Tripod4 corrected tips.