Safety bicycle c. 1890, maybe George Townsend?

I bought this interesting early diamond frame safety some time ago in France. On the bracket two letters say 'WT', but it could well be the initials of the foundry.
The serial number 4838 is stanped in many parts: front of the lower head lug, inside crank arms. Top of front fork etc. 

I found an advertisement of the George Townsend model 'Ecossais' on the French Tontonvelo-forum. It could well be tone of these. But to be sure I would need to see another example of a Townsend bicycle. Who helps me out in identifying this one? 
So, who knows  more about this one? If you do, please, send me an e-mail.

Click left picture to see more.