I have tried to find the right reels to these Neptuna cradles many times. I have seen them with Fin-Nor reels, Everol reels and Penn reels (Standard and International types). Basically the hole spacing can be adjusted to fit a proper plate diameter and spool width but the optimum choice is to make a reel fit the cradle without changing anything.
The spec on Jeff's cradle would take a 349 side plate (4 1/8 inches), with what seems like no changes to the hole spacing, with a wide 49A spool ( 2 1/2 inches). I do not guarantee a fit without doing it myself first and I have a tendency to think, "Why would Neptuna build a cradle for a rare export wide Penn 49A model?", unless it was special ordered by a wealthy customer. I wonder what kind of rod is with this cradle? I see a locking reel seat ferrule at the forward end.
The only other side plate made by Penn at the 4 1/8 diameter is the Senator 6/O and a 6/O spool is 2 3/4inches wide.
Sure wish there was a easy answer for this but there is not. There are times that much trail and error is needed and sometime a bit of rework before a fit can be achieved.
Another strange thing here is the cradle is black. Possibly it was painted but any Neptuna cradle I have seen was either plain aluminum or gold anodized, with the exception of Brian Funai's Hot Rod Neptuna's.
This is a strange one.
