Ithaca 20 ga choke tubes

SCOUT5

I recently purchased a 20 ga Ithaca M87 in the auction side. It has a modified choke tube in it now. Does anyone know what other model/brand of choke tube will fit this shotgun?

I have a 12 ga Ithaca I purchased new about 13 years ago that can use Mossberg choke tubes but I haven't found anything on this 20 ga as of yet. Remington and Browning tubes are out, as I have both and they are not a match.

Here is a link to the auction and pictures of the shotgun which shows the # on the receiver:

http://www.GunBroker.com/Auction/ViewItem.aspx?Item=481077015

Thanks,

Scout

charliemeyer007

http://www.choketube.com/choke-tube-interchange-guide.php

SCOUT5

Thank you for the reply. Seems like Tru-choke it is.