Dating a photograph

The Photograph

Recently the Moray Libraries an Information Services posted a photograph of the Elgin Plainstones on Facebook:

Elgin Plainstones. Posted to Facebook by Moray Library and Information Services

They wanted help in dating the photograph and so followers chipped in with observations about the content of the photo. But what about a more systematic approach...
So what in the photograph can provide information about the date?

• Post office pillar box (bottom right)
• War memorial (center)
• Telephone kiosk (bottom right)
• Visible registration plate for car (bottom left)
• Bus (center)
• Shops:
• Macfarlane Bookseller (left)
• Gordon Arms Hotel (right)
• Burton (right)

So let's work through these and see what they can tell us...