The clock kit is from here. The kit comes without the case, suitable case can be purchased here.
The files I received from the seller are included.
The MCU used is STM8S003K3. 7-segment displays - KYX-1106BGG (can't find the datasheet for this exact part, here is the datasheet for the similar displays, also included here as TOS-1106BS-B.pdf).
Quick directions: R16-R23 - 220R (resistance may vary for different displays); R1,R7-R10,R29 - 10k; R11-R15 - 2.2k; C11,C13 - 20pF; C1 - 0.1uF (marked 105); C2,C4,C6 - 10nF (marked 104). Buzzer plus pin towards power connector. DS3 should be placed decimal point up.