[GreenKeys] Anyone know what this is?

[John W9DDD]

Another guess, I'm remembered telephone poles marked with a metal strip that had its unique ID.  However I don't see how you'd easily use this box to do that.

John, W9DDD


> On Jun 1, 2022, at 7:54 AM, "til128 at juno.com" <til128 at juno.com> wrote:
> 
> From the sizes of the numbers/letters (7/16 to 1") I am going to stick my neck out and say it is for putting IDs in sand castings. Tom T
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
> 
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w9ddd at tapr.org