Thanks for the quick reply and sorry this is late being added.
I now have a spreadsheet with all the early cancellations on.

I have a mint sg336 with inverted and reversed watermark. The Stanley Gibbons concise and specialised catalogues only show a dash as the current value. I have searched the internet for sites with a similar stamp forsale to no avail. Anyone got any idea as to the value of this stamp?

I have a plated penny red with a duplex cancellation of F37 does anuone know where F37 was used

The Great Central Railway (GCR) Class 8K 2-8-0 is a class of steam locomotive designed for heavy freight. Introduced in 1911, and designed by J. G. Robinson, 129 were built by the GCR.

I have both the morley bright detector and the Signoscope and for value and ease of use the Morley detector wins.

In my "spares" I have an SG1254 16p stamp from the Grenwich Meridian series which the backgound behind the Earth is black instead of blue. Is this a common error as I have not been able to find anything about this. The only error listed is one of black double printing which refers to the w...