rick_oleson:
Grandpa's digital caliper
rick_oleson:
Old measuring instruments - weight
rick_oleson:
Old measuring instruments - weight
rick_oleson:
Old measuring instruments - weight
rick_oleson:
Old measuring instruments - weight
rick_oleson:
Old measuring instruments - weight
rick_oleson:
Old measuring instruments - weight
rick_oleson:
Old measuring instruments - weight
rick_oleson:
Old measuring instruments - hardness
rick_oleson:
Old measuring instruments - lenses (and curved surfaces in general)
rick_oleson:
Old measuring instruments - lenses (and curved surfaces in general)
rick_oleson:
some seriously cool obsolete technology
rick_oleson:
planimeter
rick_oleson:
scale
rick_oleson:
norwood
rick_oleson:
drafting
rick_oleson:
hygrodeik
rick_oleson:
Toy micrometers
rick_oleson:
Reverse engineering a thingiewhatsit