My understanding was that any of these backpack or suitcase nukes were rendered useless as the fissile material deteriorated fairly quickly.k
They were useless unless used in a very short span of time.
I really couldn’t say - when asked what his odd MOS was, he would stretch his arms to the sky, bellow “Nuclear Demolitions!” at the top of his lungs, followed by a long stretch of stereotypical villain laughter.
It was both hysterical and slightly unnerving. Interesting days.