Well, on Roland's database I see the documented serial numbers are:
(for the 5 cm f:1.1)
Lowest: 119601
Observed: 119625 - 120448
Your sample: 119602
So, you probably have the second lens ever produced
(for the 5 cm f:2 H.C Tokyo)
Lowest: 50080101
Observed: 50080148 - 50081069
Your sample: 50080101
It looks like it's the first ever produced
Roland shall have to update his database...
GOOD FOR YOU
Ciao from Massimo