Watcher's secret riddle

can you please tell me the answer to this riddle and all i know is that the answer is a four digit code:

A

?| •

B
C

2 B 19C British forces surrendered the king’s palace.
15 B 19C Singapore surrendered.
24 B 19C Shch-213 destroyed Struma.

X

What did the Watcher’s see on the door?

Y

Krutovig's blue bird said Y at 16:03 +2GMT 19 October.

Z

And the LORD said unto Samuel, Hearken unto the voice of the people in all that they say unto thee: for they have not rejected thee, but they have rejected me, that I should not reign over them.