My memories of Platignums were not fond, but the only ones I had during
the latter years of primary school were the very cheapest ones which
came in a bubble-pack from Woolworths. I know now that they made some
more durable pens and some quite good calligraphy nibs, and of course
they came from a firm which had an honourable history. Back then,
though, they were the bane of my life, conferring ink-stained fingers
and blotted copybooks upon me. Later I discovered the excellent
Osmiroid 75 and the range of nibs they offered and they lasted me until
I left school.
I stuck with fountain pens and have several De La Rues and Swans that I
bought in junk shops and used as dip pens because neither sacs nor cork
seals were available for a while...