Thank you for your contribution David,
there seems to be many types of 12 in circulation,however none Singer brand from what I understand.
It would be interesting to know how many declinations W&W made,and how they differed.
I attach pictures of mine,these are pictures I had taken by the seller,then as soon as it arrives I can take more if needed.
I really like the table on mine,original W&W.
John L.,can you tell what differences you notice between your 12 and d12?