Chas A. Stromberg and Sons, Boston Mass, U.S.A.
to 5 string with custom neck by Mash
The first picture is the neck
of Stromberg Deluxe. The center laminations look like
red-blue-maple-blue-red, so I prepared these boards which I
dyed sometime ago.
The red board at the left is a
little thicker. The neck wood is Madagascar Kingwood, a kind
The inlay pattern was traced
and glued on abalone blanks.
Then glued on a balsa board.
Hand cut with a jewelers
The left half of the Stromberg
logo, which is included in the case, seems to be a part of
original inlay of this banjo before it was modified.
Other abalone debris are
also included, but not re-usable.
The inlay of this Stromberg has
been replaced sometime ago and the quality of craftsmanship is
It looks like a bird.
It might be a bird.
Is it a bird ?
Traced and routed with Dremel.
The center line of the
picture is the center line of the neck, but not the fingerboard
center line. The fingerboard center line is the 3rd string line,
though it doesn't seem to be located in the center. 5 string
neck is confusing.
The fan keep blowing ebony dust
away during routing. It's a little bit too cool and noisy.
Set with epoxy and charcoal
powder. Some fret slots had to be protected with teflon sheet .
Peg head inlay
Sanding with a sand paper on a
The leaf is eaten by a
It's actually worm
eaten part of abalone.
but . . .
the pearly layer of the
bird's head is almost gone. This abalone block was a bit too
Beheaded and waiting for a
A new brain is grafted. Is she
smarter than before ?
Fingerboard is shaped and
Engraving lines are drawn.
Engraving with gravers.
Straight lines need a
Scriber makes the
The resonator side wall is
broken and repaired more than one time, sometime ago. It is very
unstable and about to separate.
Newer marquetry has been used.
A little different.
The lower one has similar color
to the original, but the dimension is different. The upper has
nearly equal dimension.
. . . . only nearly. A little
taller. And the dye is not penetrated deeply enough.
The side wall lip is very thin
and it will break again easily. There is a space between the lip
and flange to accept a reinforcement.
Old glue and finish are
At first, the cracked lip is
A wood strip is bent .
. . . then glued inside
of the lip . Now it is stabilized and further treatment is
Non-matching marquetry is
The new marquetry with slightly
reduced height is fitted to the place.
Blue stain added.
Peg head shape was traced
with a white carbon paper.
Shaped with a spindle
sander after rough cutting with a bandsaw.
Routed for marquetry.
Slightly tilted inward to match to the contour of the neck.
Glued with Titebond.
Bound. The 5th peg area
was pressed with a wooden rod.
Done. Then scraped.
Rough shaping .
Heel cap glued.
Here’s Stromberg replica( if
one ever exists ) 5-string tailpiece.
traced on 3mm brass plate.
shaped with sander and
The original is one piece cast
brass, but this one will be made of three parts.
the angle of the 2nd string slit
is wrong . I have to fill and do it again.
welded with copper weld. Skilled
craftsman will not leave such an excess. .
I was going to stamp
“STROMBERG” logo, at first, but after some practice, I was
sure I would not be successful .