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dap
PostPosted: Sun Jan 31, 2021 5:47 pm  Reply with quote



Joined: 24 Mar 2010
Posts: 280
Location: Northwest PA

I know that Ithaca flues were marked as follows.

'0' is cylinder bore.
'1' is improved cylinder.
'2' is modified.
'3' is improved modified.
'4' is full choke."

One of my barrels is definitely a 4 (Full). I'm not certain of the other. I think it is a 1, but I suppose it could be a 3.

What is the concensus?

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kennedy756
PostPosted: Sun Jan 31, 2021 6:16 pm  Reply with quote



Joined: 30 Sep 2015
Posts: 637
Location: NEW SALISBURY INDIANA

I think its a 2

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16ga 3-Win 37
16ga Ithaca 37 1946
16ga Western Auto Revelation
16ga Browning A-5 1929
16ga Marlin 90 1939
16ga browning citori lightning grade 3 2003
16ga Francisque Darne 1920
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Flues16
PostPosted: Sun Jan 31, 2021 7:02 pm  Reply with quote
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Joined: 07 Jan 2013
Posts: 398
Location: Virginia

It looks more like a 1 to me. However, I've never seen an Ithaca double marked improved cylinder, all I've ever seen were full (4), modified (2) and cylinder (0). Doesn't mean there aren't some out there, but if they exist I think they are rare.

The best way to determine what you have is to have someone with a bore gauge measure the amount of constriction in the choke.

I have seen many Model 37s marked 1 for improved cylinder, but they were made long after production of the Flues ended in 1925.

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Savage16
PostPosted: Sun Jan 31, 2021 7:16 pm  Reply with quote
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Joined: 30 Nov 2011
Posts: 1694
Location: Minnesota

After clicking on the pic to enlarge it, 1&4, a rare combo indeed.

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skeettx
PostPosted: Sun Jan 31, 2021 8:06 pm  Reply with quote
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Location: Amarillo, Texas

Mine is a 4x4

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dap
PostPosted: Mon Feb 01, 2021 3:51 pm  Reply with quote



Joined: 24 Mar 2010
Posts: 280
Location: Northwest PA

I had a friend measure it soon after I got it. He said it was IC and Full, but I don't think he ever gave me the actual diameters. That was also before I knew about the choke markings being stamped on the barrel flats.

I was wondering if a previous owner might have had the right barrel opened up, but it looks like it may have come from the factory with this configuration.
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dap
PostPosted: Mon Feb 01, 2021 3:57 pm  Reply with quote



Joined: 24 Mar 2010
Posts: 280
Location: Northwest PA

skeettx wrote:
Mine is a 4x4


Tell your flues Happy Birthday. If I'm reading everything correctly your gun turns 100 years old this year.
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