Dear Neil, May I please ask, via Scribe a line, if anyone can help with information about my OMT10 inch No. 2 Optical Rotary Table. This is a splendid piece of kit (probably pre-1960) which I have owned and used for about 25 years. When I first bought it, the internal scale appeared to carry a coating of small droplets of oil; however, this did not interfere with reading the scale and there were no problems in use. The same scale now appears to carry a rather coarser coating of droplets which obscure the scale to some extent. At first I thought that it was oil due to over enthusiastic lubrication by a previous owner but I am now considering that it may be condensation and, as a test, it is now installed in the sitting room to see if it will dry out - so far no change.
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