The above plaque is 164 mm in diameter, finely potted, and has the impressed mark 'WALLACE & Co'.  Note the crossed leaf stalks at the bottom of the transfer, where usually there are flowers. It is also decorated with a cobalt blue border – I know of very few others.

R C Bell (Tyneside Pottery, 1971) writes that the pottery in Forth Banks, Newcastle, was managed by Redhead, Wilson & Co before 1838.  He says that James Wallace & Co operated at Forth Banks between 1838 and 1858, and that in 1858 the pottery became simply Wallace & Co. Bell gets his data from business directory entries. However, this plaque, and those below, almost certainly predate 1858.  Even the date of 1838, when James Wallace took over the pottery seems quite late for the above plaque.  N.B. C.C. & Co were producing similar plaques c1830. 

This rare plaque has an indistinct Wallace & Co impressed mark (the 'WA' is missing).  Right is a detail of an engraving by H T Ryall after a half-length portrait in Holyrood Palace.  John Knox was a protestant clergyman who brought about the reformation of the Church of Scotland.  Read more below.

http://en.wikipedia.org/wiki/John_Knox

Rectangular plaques of preachers with joined-up script.  Neither of these plaques is marked.  They are attributed to Wallace & Co on the basis that they belong to the same series of transfers as Knox above.  Click here to read more.  Left: 'R Raikes', 'Founder of Sunday Schools'. Stephen Duckworth has suggested that the Robert Raikes plaque might have been made in 1836 to commemorate the centenary of his birth.  Right: 'Dr Adam Clarcke' (sic).

The loving cup above gives a glimpse of a Wesley transfer in the same series, which I've yet to see on a plaque.
 

 
An unusual pair of plaques, which although unmarked, are similar in style to the plaques above. They also have cobalt blue in the borders. The illustration on the left, of a girl sitting beside a grave, is signed 'J Harbottle fecit', ie J Harbottle made it.