This is one of at least four related Hero models that appear to share the same nib, feed and section and sell for around $2US on eBay. They are generally metal pens with medium, open nibs. This variation vaguely resembles a Parker Sonnet. Mine is black and looks pretty classy for the price. White and pink are also available. A related pen is the current 7022 which I reviewed here.
There you can find photos of the 7022 and also a photo of what I take to be an older model also numbered 7022.
My 7023 is a cartridge/converter pen but just what cartridge fits is unclear. Possibly some Hero cartridges, which would mean your color choices would be very limited (3). I found that neither short international nor Waterman cartridges would fit in the barrel. A generic long international fit in, but it took pliers to get it back out again. It also took some fiddling with the alignment of the times, but in the end the pen gave a smooth, wet line with that generic cartridge, about like a Sheaffer medium nib.
After sitting for eight days unused the pen was very hard to get started again. I have had such issues before with these cartridges so the jury is still out on this issue.
So far this looks like a great choice if you would like a very inexpensive pen that is durable, attractive, and would not be out of place in a business environment -- provided you will be using bottled inks. Other pens in the family are the 7031 and 7036. Some of these four models are available with hooded nibs, and there are additional model numbers that only offer hooded nibs.
With all the problems with pictures on FPN I am only posting ones you can't find elsewhere. There are many pictures of the pens discussed here at eBay.