Stamporama Discussions: 20p Machin Block With Chiswick SDO 4 Cancel

Europe/Great Britain : 20p Machin Block With Chiswick SDO 4 Cancel

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Linus

12 Mar 2020
01:26:25pm

I bought this block at the recent Snowpex Stamp Show in St. Paul, Minnesota, successfully soaking it off of the brown paper it was on. The postmark is from Chiswick S.D.O.4 dated 8 July 1976. I see that Chiswick is a district of west London, England. Does anyone know what the S.D.O. 4 means?

Thanks,
Linus

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sgm

12 Mar 2020
01:45:15pm

re: 20p Machin Block With Chiswick SDO 4 Cancel

I believe SDO is Southern District Office. Not sure about the 4.

"Spending my children's inheritance one stamp at a time"

jmh67

12 Mar 2020
04:39:34pm

re: 20p Machin Block With Chiswick SDO 4 Cancel

The number 4 is probably just a distinguishing mark, like the lower case letters in German postmarks, or the capital letters in British steel ring postmarks. I guess that this was a larger post office with several postmarking devices in use, that had to be distinguished from each other somehow.

-jmh

Linus

12 Mar 2020
05:18:57pm

re: 20p Machin Block With Chiswick SDO 4 Cancel

Makes sense, thanks for the info!

Linus