To increase the clarity of the map I have removed some stains (which looked like Lily pollen) as well as reducing the hue of the colour washes. I think that the plate used to make this version had been substantially reworked. There are some faint structures which look like ghosting from an earlier map and random speckling, particularly in the centre streets. Some of which could be name changes.

Bacon's maps are rarely dated, usually being called "up-to-date" or "new". Often this meant the latest, most high profile, features were added but the whole area may not have been updated.
The Manchester Ship Canal was built between 1887 and 1893 and opened in 1894. I suspect that this map was updated sometime during its construction without a new survey of the rest.
Throstle Nest Farm is shown on the map. Manchester United built their football ground here in 1909 and were defeated by Liverpool in the first game in February 1910.
Manchester County Cricket Club ground (where they had been since 1857) is shown surrounded by other clubs' grounds. This became the Manchester and Lancashire County Cricket Club in 1880 and a number of buildings were erected in 1884 with the large mid-wicket Pavilion completed in 1895 (not shown).
Exchange Station was opened in 1884 and is shown on the map.

The date range is therefore about 1887 to 1895 so I have called it c1890. Please let me know if you have specialist knowledge to help narrow down the date.