Unknown CDC unit , looks like a drum memory ?

[Ed Sharpe]

OK  I  see there is a  mix  of  photos in this  directory!
some  tape  reader  some  drum  2  separate  topics.
 
 
In a message dated 5/16/2018 10:04:56 AM US Mountain Standard Time, cctalk at classiccmp.org writes:

 
 I will check this to see if there are any pictures

http://www.computerhistory.org/collections/catalog/102680349


On 5/16/18 10:04 AM, Al Kossow via cctalk wrote:
> http://www.oocities.org/athens/forum/8564/books/wmthesis/thesis_01.htm
> references the 863 being used on the CDC 3100
> 
> On 5/16/18 10:00 AM, Al Kossow via cctalk wrote:
>>
>>
>> On 5/16/18 9:13 AM, jos via cctalk wrote:
>>
>>> Anyone can identify this ?
>>>
>>
>>
>> if you look on bitsavers under cdc/catalogs M90310500_Internal_Literature_Catalog_Jul75.pdf
>>
>> lists several drum storage units including the models 861, 863 and 865
>>
>> the controller looks a little too early to be for the BG504A
>> the one you're trying to identify looks to be using 1604/160 series modules
>>
>> 39731700A_BG504A-H_Drum_Memory_CE_Manual_Jul72.pdf for the 1700
>>
>>
>