I chose seven examples of Czech glass era glass pieces with the same marks for this article, as shown above, a Kralik mark which also has open 'O's but in a curvy script type of font and a capital 'C', also placed in an arch, as you can see side by side. It's likely there was a template or stencil used with the usual acid application. I am convinced I could find more to post here, these were selected because I could provide clear Kralik attributes, with shapes and/or decors, and the marks were still whole and readable. Below, I will post related Kralik pieces some with the most accepted arch Kralik open 'O' mark, in a heavy block font. Collectors familiar with Kralik glass of this period 1919-39, will see right away the glass item connection. As discussed already, these marks are not necessarily company marks, they could be applied by the exporter or distributor to the USA, or by one of the many Kralik glass factories. It's also a good opportunity to display many Kralik decors and shapes which may not be familiar with most collectors.
ANTONIN RÜCKL & SONS 1919-1939
Including WILHELM KRALIK & SONS Czech Glass
MoreCzechKralikII - A THIRD MARK MAY BE CONFIRMED HERE
TOP OF VASE IS CUT OFF