Investigating further I see that the problem may not be as bad as I thought.

The early Bulletins are 4-hole only, but the later ones have 4-hole stiff gray cover sheets with 7-hole (3-hole plus 4-hole) interior pages. So I can just punch an extra 3 holes in the cover sheets and be all set.

The conversion from 4-hole to 7-hole probably happened when the Bulletins became collections of 57x-xxx-xxx BSPs.

Whew! - I was looking at a stack of 40 or so unbound manuals and not wanting to 3-punch all those....

Nick England K4NYW
www.navy-radio.com

On Mon, Jul 11, 2022 at 1:37 PM Nick England <navy.radio@gmail.com> wrote:

I have a number of manuals that are loose-leaf with no hard covers.
They are punched with the standard Teletype 4-hole pattern.

I'd like to put them in report covers of some sort.
Does anyone have a source for 4-hole binders or report covers?
Or 2-hole (7" spacing) that fit the Teletype pattern.

Otherwise I have to bind them with zip-ties or re-punch them with a standard 3-hole pattern (8.5" spacing)

Thanks
Nick England K4NYW
www.navy-radio.com