Raleigh Serial Number deciphering

[NJH90]

I've had this old Raleigh racer for years and I've never been able to date it. It doesn't seem to fall into any of the common number systems I've seen online. No decals. Any ideas?

That's 63121 on the bottom Bracket and 8124770 on the seat tube. Excuse the rust, I'm about to respray

 

[Midlife]

If you post a few pics of the frame the details often give a clue.

 

[NJH90]

I've had this old Raleigh racer for years and I've never been able to date it. It doesn't seem to fall into any of the common number systems I've seen online. No decals. Any ideas?

That's 63121 on the bottom Bracket and 8124770 on the seat tube. Excuse the rust, I'm about to respray

 

[Midlife]

Top tube guides, under BB cable guides but nutted brakes sort of puts in early 70's.

Glue on Raleigh badge and a Raleigh seat bolt can de additions.

Don't recognise it as a UK Raleigh but could be wrong. Maybe an export, overseas made or not a Raleigh

 

[dorset boy]

Custom are stems used by Raleigh,if you have the time and are that bothered take the fork out and look into the headtube as the badge had three locating holes.

 

[vcballbat]

Looks like a late 80's Raleigh Flyer or similar Raleigh entry level racing bike