[78-L] Dating two late Canadian RCA 78s

[agp]

Can anyone help me date two late Canada only RCA 78s I just acquired. 
They were pressed for the Quebecois rock'n'roll audience:

RCA Victor 56-5438 - Charlie Brown (mx.10K2PB-1056)  b/w Le Danse des 
Printemps (mx.10K2PB-1003)
RCA Victor 56-5447 - Jones c'est Morte - Along Came Jones 
(mx.10K2PB-117)  b/w Les Trois Cloches (mx.10K2PB-1118)

Both are by Les Jerolas, and the A-sides are of course are covers of 
the tracks by the Coasters. My research seems to indiicate 1959. I'd 
like to narrow this down to the month if possible. I show that they 
had one more relase in 59, cat 57-5458 as a 45 of Une sourire pour 
Noel. My guess is that this was a Christmas release and so no 78 exists.

Anyone have any thoughts

T