Author Topic: What does this mark mean on my 20AL?  (Read 334 times)

Offline Partyline4

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What does this mark mean on my 20AL?
« on: February 01, 2018, 09:50:12 AM »
I didn't notice this mark on the 20Al perch for a while after I got it. It looks like it was intentionally punched out to disregard something?

What do you think?
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Offline poplar1

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Re: What does this mark mean on my 20AL?
« Reply #1 on: February 01, 2018, 10:14:23 AM »
20-S is the model number for an earlier desk stand. It was like the 20-B except that 20-B was nickel plated and 20-S was black japan finish.

Both had a "non-insulated" transmitter, with one exposed wire going through the back of the transmitter bell ("cup"). Also had a #122 receiver with exposed terminals.

"20-S" was struck out when the phone was converted to a different model. Is there another number stamped on the front or side of this part?
"C'est pas une restauration, c'est une rénovation."--François Martin.

Online HarrySmith

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Re: What does this mark mean on my 20AL?
« Reply #2 on: February 01, 2018, 11:05:42 AM »
Usually if not stamped with the new model number designation under the strike out it is stamped on the reverse side.
Harry Smith
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TCI

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Offline Sargeguy

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Re: What does this mark mean on my 20AL?
« Reply #3 on: February 01, 2018, 04:23:50 PM »
I have seen phones that have the model number stricken out but no replacement.  I wonder if these were purpose made phones that didn't align with a specific model OR maybe they just couldn't find the 20-AL stamp.
Greg Sargeant
Providence, RI
TCI /ATCA #4409

Offline Partyline4

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Re: What does this mark mean on my 20AL?
« Reply #4 on: February 01, 2018, 09:01:57 PM »
I'm sorry, I failed to mention the other side does have 20AL on it, I didn't even notice the other side pictured until today!
I've been painting it today, only warmish day we'll get in Durham today this week..I plan to picture it when I'm done!
I've included a picture of the 20AL.
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Offline Partyline4

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Re: What does this mark mean on my 20AL?
« Reply #5 on: February 01, 2018, 10:41:40 PM »
Something I didn't realize is that you can take apart the bulldog and see the element. Just figured it out playing with it..Element is from 2/40, and the cap is from 12/21/39...

Neat....
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Offline Sargeguy

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Re: What does this mark mean on my 20AL?
« Reply #6 on: February 02, 2018, 02:19:58 PM »
This looks like a typical refurbished 20-AL made of a combination of older and newer parts.  They are often seen with a riveted/notched AMERICAN BELL TELEPHONE transmitter cup. They were made during the Depression through WWII.
Greg Sargeant
Providence, RI
TCI /ATCA #4409