Ted,
Sounds like maybe an earlier Bedrock plane, see Bob
Kaune's pages for details of Bedrock types:
http://www.antique-used-tools.com/brtypes.htm
Type 4 and earlier Bedrocks didn't have the pins and
screws that the later types had, just regular frog
attachment screws like regular Bailey planes.
Hope this is of some help.

Jim Erdman (Menomonie, WI)

--- "Stevenson, Ted"  wrote:

>     I'll end (for any brave souls who've read this
> far) with a
> What-is-it? question. Once I started looking over my
> 'old tools,' I took
> out and dusted off an old #3 bench plane that had
> been bequethed to me
> by a retired carpenter friend. I'd been using it as
> a scrub. On
> dismantling it for a good cleaning, I figured I'd
> "type" it using the
> flow chart. But no luck. The only identifying mark
> on the entire tool is
> on the iron (Stanley Sweetheart logo). The body has
> no cast ID of any
> kind, BUT, the frog/bed mounting system -- and the
> form of the frog
> itself -- are apparently identical to the BedRock
> design (as found on
> B&G). That is a sloped (20 degree?), grooved, fully
> machined bed that
> meets the tongued, fully machined frog. There is a
> single frog-adjusting
> screw engaging a stud screwed to the frog proper,
> just as illustrated at
> http://www.supertool.com/StanleyBG/bedprop.htm. The
> difference is that
> the frog is retained by two screws into the bed, as
> with a Baily design.

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