Understood.  Professional belt re-webbing is expensive.  However, the magnetic latch Kangols are a novel period part.  If you do not use them... do NOT throw them out.  The belt hardware (buckles etc.) is valuable.

Thanks for input.
had to cleanup one of the belts but both belts are now in the car.
once I have the car actually running I may need to replace the webbing of one belt or just purchase “modern” belts.

All good info.  However, when RogerOtto revived this old thread asking about seat belts he said he already has the 3-point magnetic Kangols.  

Since you have the belts, open the links I posted earlier and look at the hardware pictures.  Then Google for sources of "seat belt hardware".  You can start by browsing the items at Summit Racing.
https://www.summitracing.com/search/part-type/seat-belt-components

If the webbing on your belts looks original/old, consider having them rebuilt.  One source is Ssnake Oyl (see link below).
https://www.ssnake-oyl.com/

Thanks for the input.
based upon the photos I was able to identify a bag of bolts which are for the seat belts.
I wondered what they were for!

I may also have found the stiffener for the tunnel attachment.
it is a 3” x 1.5” slanted rectangle about 3/8” think with 2 threaded holes.
the screws are heavy duty!

I will try to fit these to the underside of the tunnel today to confirm they fit.
i assume the drive belt sim attached to the driver side tunnel and they do not cross over.

Next I will attack the front sliding windows.

thanks

https://www.wescoperformance.com/resebe.html

I bought read ones for my Riley Elf here. Front and back.

I just went to advance auto parts and got the generic lap seat belts.. came with universal bolts. later bc

The threads are 7/16-20 (UNF).  With two tapped holes on the door opening, the car is set up for 3-point belts.  The long belt attaches between the upper and lower holes.  The tunnel holes are for the shorter static part of the belt.

I don't remember if my car had the reinforcing washers on the tunnel.  Regardless, the reinforcing washers would go on the outside of the car body (inside the tunnel under the car).  Do not use regular fender washers.  Seat belt reinforcing washers are hardened.  

If I am remembering correctly, my car has finished head bolts for the anchors, not plain hex head bolts.  I believe there are spacer/collars between the head of the bolts and the car body so the end brackets on the belts are free to pivot.  I remember there may be a wave spring between the bolt head and the belt bracket to prevent things from rattling.

See the thread and pictures lined below on the MG Experience website.  Also see the Mercedes link which shows the bolts and spacers.

https://www.mgexp.com/phorum/read.php?71,2302794,page=2

https://www.authenticclassics.com/Kangol-Seat-Belt-set-Mercedes-230SL-250SL-280SL-p/auth-009029.htm

You mentioned a nut/bolt reinforcing place for the tunnel mount.  
any idea what this looks like?   I am trying to put my 66 S back together and have lots of unfamiliar parts.

The door pillar has 2 threaded holes.  Any idea what size bolt I need for there?   What types of washers and how many are needed to anchor the belt. In these holes.

i have the magnetic 3-point Kangol belt.

My wagon, my Cooper S and most of the other mid sixties cars I've been around have regular seat belt mounts in the door post and sill, and then the two bolt mount for the latch end of things on the tunnel.  I have even had a 997 Cooper with the high mounted captive nut at the top of the doorpost.  These cars all had Britax seat belts, or those belts were able to be fitted.

Early Minis (at least by 63) had holes for lap/sash (ie 3 point seat belts).  The outside holes have reinforced captive nuts while the centre is just a hole (or two - one on each side of tunnel) which took a nut/bolt/reinforcing plate to connect the buckle end.  These normally come (came) with the belt.  Some time around (before) 63 the upper mount was relocated lower on the B pliiar. 

I have seen early cars with a hole straight through the B pillar with a large headed bolt on the outside. I assumed these bolts came as part of the belt installation pack.

I'm sure you can still buy suitable non-inertia 3 point belts in Oz.  Its only been a few years since I replaced the ones in my Traveller.

The other day while rummaging through the shed I found a brand new 3 point belt still in its packet (with bolts and instructions).  Its very pretty - pale blue/grey with an aircaft type buckle - but I'm not sure what I should do with it.

Cheers, Ian

Make a bracket to go from the two bolts to the one larger bolt.  Chrome it.

My '64 came with the magnetic latch, 3-point Kangol belts.  The upper anchor point is on the door pillar near shoulder height.  I was surprised to find 3-point belts in my car as I didn't think they were in common use during that period.

The Kangol belts show up on eBay every now and then for silly amounts of money.  A nice generic 3-point belt system with chrome latches as shown in the link above would still look period correct.  I think if you opt for a grey belt (instead of black) with the chrome buckle the appearance would be somewhat like the Britax belts which were also in use during the Mk1 period.

Aloha Smurf,

Most of the early Mini's would probably have had the static 2-way 'Kangol' belts. You can order brand new static replacement seatbelts with the spring loaded clips to snap on the loop studs, (eyelets). Two loops would have also been on the tunnel on the early Mini where the two small holes are. Most guys upgrade to the inertia type belts for convienence, (and 3-point at that for safety), but if you're after the more original application for a MKI, you may want to go with the basic static belt. I don't recall the manufacturers name where I had a set made for my '62 Countryman, but if I remember it I will post it here OK.                                                      Mini Estate

 

Don has these vintage looking belts >>>//www.minimania.com/part/SEATBELT011/Seatbelt-Lap-Only-Vintage-Style-Seat-Belt

You need the same ones, only with the snap hook end fittings like the ones in the attached photo >>>

If worse comes to worse, 'Andover Restraints' can make you a set, or buy 'Mini Mania's' and use the provided hardware, (non-snap hook)

what are you guys using for seat belts on a mk1?  this car has the two small holes for the belt bracket on the tunnel.  The bracket has the loop stud screwed in it for early belts that would clip in place.   Looking to find set of diagonal belts in black that will bolt up thanks