Kanji on bottom of two grenades

[john mack]

Any help on what either of these say is much appreciated . I have never had one with a round paper tag on bottom before .

[GHP]

延期
四〜五秒
秒時

Delay
4~5 Seconds
Time in Seconds

=====
Paint:

九八式
kyuu-pa shiki
Model 98
--Guy

[john mack]

G

Thank you a million times . I have learned from your translation ...