0038 - 0044 UTC
SINPO: 34343 with a wide signal
Yes this was a stroll down mammary lane, as I heard these Classic Interval Signals too.
Radio RSA among them and possibly Radio Moscow.
Also heard a harmonica type IS and a church bell type IS.
Broadcasting on AM but USB was great here.
Possible WLIS (We Love Interval Signals) as referenced by myteaquinn,
and they made an appearance last year (11/4/13) according to HFU.
Please don't be a stranger, as we do love 'em.