Well done, Sherlock!
Alan C
On 08-Mar-19 04:39 PM, Postmaster wrote:
Mark Roberts wrote:
https://www.flickr.com/photos/bc_the_path/sets/72157707409395914
I have no idea what it is but it's fascinating! If you have no luck on
the PDML try posting it at https://old.reddit.com/r/whatisthisthing/
I posted it myself and within 10 minutes got this reply:
https://www.google.com/search?q=Rayner+hand+Spectroscope&tbm=isch&client=firefox-b-1&biw=1024&bih=611&gbv=1&sei=N36CXPxQipGCB7vLp4AJ
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