What is the faint image to the right of edinburgh castle on the back of a rbs £1 note?

Question

What is the faint image to the right of edinburgh castle on the back of a rbs £1 note?

Answer 1

It is the watermark. It is a portrait of Lord Ilay. It is visible from both sides. Hold it up to the light.

♣

Answer 2

Its the original engraving of the facade of the Bank's Registered office at 36 St Andrew Square, used on earlier versions of the Royal bank's £1 notes.

Use the link to the £1 note and click on the Back view and then click on the original engraving link.

http://www.scotbanks.org.uk/banknote_des...

http://www.scotbanks.org.uk/banknotes_cu...