Kernrechtsfrage
Whether the bid deadline was complied with by posting the offer in time despite a later postmark.
Extrahierter Entscheid
The deadline was defined by posting time, but the appellant failed to prove timely postal submission; the bid was therefore late.
Extrahierte Begründung
Although posting in a PTT mailbox counts as postal submission, the sender bears the risk that the postmark is affixed in time. The appellant's assertion and the postmaster's statement only made timely posting possible; no witness or other clear proof established submission by 11:00.