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Subject:
Thos Bros date codes
From:
Angie Cope <[log in to unmask]>
Reply To:
Maps, Air Photo & Geospatial Systems Forum
Date:
Tue, 22 Jan 2008 08:47:55 -0600
Content-Type:
text/plain
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text/plain (23 lines) 
-------- Original Message --------
Subject:        Thos Bros date codes
Date:   Sun, 20 Jan 2008 14:14:44 -0800 (PST)
From:   Kevin Walsh <[log in to unmask]>
To:     Maps-L



Hi -

Their older (1940-50s) date codes were similar to those of ACSC;
generally, a numeric code (hidden down in a corner inside the border)
read backward.
EG, 954 would be April 1959.  Up thru the 1930s, codes seem to be lacking.
In the 1960s and 1970s, they'd show a long string of hyphenated numbers,
from which you could pick the month and year out rather easily.

Cheers,

Kevin Walsh

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