Great Britain. Public Record Office. Ultra
- Location: McKeldin Library
Call Number: Microfilm D810.C88U477 1979 - Great Britain. Public Record Office. Ultra.
139 Reels.
Description
This collection contains 350,000 previously classified radio messages which were intercepted by the Allied Commands between November of 1943 and May of 1945.
The messages are arranged in chronological order according to serial number.
A separate section entitled "Pro Ultra" contains pre-World-War-II messages. There is a key to serial numbers and "Pro-Ultra" references at the beginning of each reel.
The index is actually an inventory of the collection. The introduction offers a full explanation of the arrangement of the radio messages.
Index/Guide
The following source provides more detailed information about the contents of each microfilm reel in the collection:
- REF D810.C88U477 1979 INDEX
- Index to Ultra.
