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1925 Corona 4 Serial # H212722 1925 Corona 4 typewriter, Serial # H212722 Fumitaka Hayashi's 1925 Corona 4 typewriter. 2026-10-10 From the Virtual Typewriter Collection of Fumitaka Hayashi: 1925 Corona 4 Serial # H212722 A Corona 4.

This one was built in 1925, before Corona started painting the 4s with DuPont Duco paint. My other one is a rather pretty Duco blue, but it is a rust bucket.

The paint was pretty messed up on this one, with quite a bit of rust, especially on the ribbon covers. So I stripped and repainted it. I also touched up a lot of the flaking paint, to stop further rusting if nothing else.

The case looked like it had gotten some moisture damage, as the plywood was delaminating at parts, and some of the finger joints had come undone. I was able to fix these issues with wood glue. However, the covering is coming off on both the outside and inside. I am unsure if I'm just going to glue it back on, or if I want to try stripping the covering and just staining/varnishing the wood underneath.

The typewriter itself is in fair condition. Only one key was slightly sticky, and the ribbon advance/reverse seems to be working fine. The drawband was snapped - this seems to happen quite often on these Corona 4s, possibly because they used gut string. The spring motor and pully is pretty accessible on these early Coronas, so it was pretty easy to fix. The other thing that's wrong on this example is that the left margin adjuster's spring detent is broken, so it does not lock in place. Initially there was a bit of wire used to hold it in place, so I have done the same. I may take that part off of another Corona 4 if I ever get around to it.

Overall, it functions better than my other one, which is somewhat prettier, and rustier.

1925 Corona 4 #H212722

Status: My Collection
Hunter: Fumitaka Hayashi (fhayashi)
Created: 10-10-2026 at 08:42PM
Last Edit: 10-10-2026 at 08:43PM

Description Hunter 10 Photos 0 Likes  Find on Ebay #AD  Find on Etsy #AD

Description:

A Corona 4.

This one was built in 1925, before Corona started painting the 4s with DuPont Duco paint. My other one is a rather pretty Duco blue, but it is a rust bucket.

The paint was pretty messed up on this one, with quite a bit of rust, especially on the ribbon covers. So I stripped and repainted it. I also touched up a lot of the flaking paint, to stop further rusting if nothing else.

The case looked like it had gotten some moisture damage, as the plywood was delaminating at parts, and some of the finger joints had come undone. I was able to fix these issues with wood glue. However, the covering is coming off on both the outside and inside. I am unsure if I'm just going to glue it back on, or if I want to try stripping the covering and just staining/varnishing the wood underneath.

The typewriter itself is in fair condition. Only one key was slightly sticky, and the ribbon advance/reverse seems to be working fine. The drawband was snapped - this seems to happen quite often on these Corona 4s, possibly because they used gut string. The spring motor and pully is pretty accessible on these early Coronas, so it was pretty easy to fix. The other thing that's wrong on this example is that the left margin adjuster's spring detent is broken, so it does not lock in place. Initially there was a bit of wire used to hold it in place, so I have done the same. I may take that part off of another Corona 4 if I ever get around to it.

Overall, it functions better than my other one, which is somewhat prettier, and rustier.

Typeface Specimen:

Photos:

#1 Pica
#1 Pica





A bit of twist-tie to hold the left margin stop in place, as the spring detent is snapped.
A bit of twist-tie to hold the left margin stop in place, as the spring detent is snapped.

Missing feet - replacements have been ordered.
Missing feet - replacements have been ordered.


The covering is falling off, the paper holder thing is busted, and all the hardware is rusted.
The covering is falling off, the paper holder thing is busted, and all the hardware is rusted.

This is the exposed edge of the case bottom, showing the plywood and finger joints - this is after I glued it back together. The faux-leather covering is peeling all over.
This is the exposed edge of the case bottom, showing the plywood and finger joints - this is after I glued it back together. The faux-leather covering is peeling all over.

Hunter: Fumitaka Hayashi (fhayashi)

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