Also, any Maytag wringer gyratator will fit in the Blue bell.
The differences between the N2L and the NX were the following:
1. No finish coat of white porcelain on the tub
2. No finish coat of white paint on the wringer, skirt & lid
3. 6' power cord instead of 10'
4. 2 "soft" rollers (black) instead of one soft and one hard (white)
5. No lid holder on the skirt
6. post-less Gyratator
7. No factory-insalled option of a pump
As far as I know, the wringer release lever changed to turquoise and the logo decal changed to the "new" Maytag logo in January of 1966 when the entire line of machines switched from red release levers and agitation knobs (on the J2 & N2) to turquoise.
To my knowledge, the post-less gyratator was never made in turquoise. It was changed from black bakelite to black polypropylene sometime around 1963 or 64 when all of the other agitators across entire production was transitioned.