I have got ah HP-35 from a american guy (SF, CA) and this seems to be a red-dot without the hole on the keyboard face plate. Ist serial number is 1143A4799 like you can see on the pictures. It have a battery pack with part code 03501A, the first type released by HP for this kind of calculator. Let me know how do you think about.
Thanks a lot in advance.
Edited: 4 Mar 2010, 10:16 a.m. after one or more responses were posted