"working version" is a correct and usable phrase in written English.
For example, you could write, "We are almost finished with the working version of the report and should be done by the end of the week."
Now it's available once more, in a fully working version.
Cells that lack a working version of it gradually accumulate genetic changes.
But IBM would take five years to deliver a working version.
By October, Dr. Smith's group at Duke demonstrated a working version, although simplified and imperfect.
The Hewlett-Packard scientists, however, have applied for patents covering their working version of the device.
A working version of the new site, which was designed in-house, was reviewed by The New York Times.
Wouldn't it be wonderful if it had a working version of the machine with my pie in it?
Tremblay said he expected a working version of the contact lenses to be available in two years or so.
The Web site is still under construction, but a working version (http://harrimanrocks.rutgers.edu) is up and running.
The working version, still subject to rewriting, differs in several ways from the advice that the government offered in 1995.
The ultimate mechanical calculator here is in the lobby space: a working version of a "differential engine" invented by Charles Babbage over 150 years ago.
