James McGee (born c1810 in Co.Down, died July 17 1885 in Lightburn, Shettleston)
married
Sarah Dunigan (born c1810 in Girvan, Ayrshire, died March 26 1888 in Lightburn, Shettleston)

in St Andrew's, Glasgow on Wednesday, October 27 1830.

James and Sarah had the following children (that I know of) —

Ann	born in Shettleston in 1833, married Patrick Lynch in 1855 and lived in Lightburn then Cambuslang. No (known) photos.
Henry	born in Shettleston in 1837, married Margaret Burns in 1860 and stayed in Shettleston. No (known) photos.
Margaret	born in Shettleston about 1839, married Daniel Colvin in 1860 and established the Colvin clan in Shettleston.
John	born in Shettleston in 1843, last heard of about 1885 in Shettleston (making ivory bowling green bowls).
Thomas	born in Shettleston in 1846, married Margaret Hyslop in Manchester in 1875 and is responsible for the Manchester McGees.

 
This picture was taken by
Wm Hall, 21 Argyle Street
(opposite Virginia Street), Glasgow
who first appears in the
Glasgow Post Office Directory
for 1880 - 1881.

 

 On the back we have
"Q's Great-Grandmother - late 19thC"
and on the page beside it, "(Colvins?)" .

Only one of Queenie's great grandmothers lived near Glasgow,
Sarah (Dunigan) McGee.

 
Assuming it is the Colvins, who are the children? If we accept a 2 year difference in ages, if the older is a boy, then it's Thomas and Susan in 1882. (I know small boys wore skirts in those days but a 2½-year-old in a dress like that?) If the older is a girl, then it's Susan and Bessie in 1884.

Plus Margaret (McGee) and Dan Colvin (left)
and my guess would be John McGee.

 

 
This picture was taken by
Paterson's Photographic Co,
344, 346 Sauchiehall Street
who first appear in the
Glasgow Post Office Directory
for 1881 - 1882.

 

 

 

 The identification is
"Jim's Grandmother".

The most likely "Jim" is James Colvin
whose paternal grandmother died in the 1840s.

 
Which seems to leave Sarah with a clear field.
My guess would be that this was taken
not long before her death in 1888,
certainly after James's death in 1885.

(She was also a grandmother of James Lynch
and a couple of James McGees.)

Thomas McGee (born January 3, 1846 in Lightburn, Shettleston, Lanarkshire, died June 2 1916 in Ardwick, Manchester)
married
Margaret Hyslop (born March 12, 1858 in Chorlton, Manchester, died December 9 1891 in Manchester)

in the Catholic Parish Church, Manchester on October 23 1875

Thomas and Margaret had the following children (that I know of) —

James	born in Manchester in 1879, married Marie Shanks in 1903 and had a large family.
John	born in Camlachie, Glasgow in 1882, never married, stayed in Manchester (Uncle Jack).
Henry	born in Camlachie, Glasgow in 1884, never married, killed in the Great War.
Sarah	born in Manchester in 1886, is rumoured to have married and vanished into the Great Wen.

Thomas with Henry, Jack, James & Sarah about 1893		"Nannie — Dad & U J's dad"