Harry, I have found painting bottles makes for optimal documentation and digital preservation. I paint almost all bottles before photographing Additionally, it helps with the displaying aspect tremendously. This particular bottle had almost unreadable embossing because it was so faint. It took me probably around 45 minutes. I can happily say that I only made a few mistakes which I had to redo.
Testors® Enamel Paints worked well for me in the early 1970's.
If the formulation has not substantially changed since then--personally, I don't know if that's the situation--I can recommend giving them a try with a small, round sable brush.
My own tastes have changed, and I prefer not to highlight the embossing with paint on my own bottles. I prefer the appearance of the four Warner's Safe bottles pictured in Harry Pristis' posting. However, one nice thing about glass is that it is relatively inert with most solvents, Hydrofluoric acid excepted! It is relatively easy to restore bottles to their original condition should one grow less enamored with the highlighted appearance over time.