An interesting Labuan pmk

Received an email from tapiapi yesterday regarding the Labuan pmk he saw on ebay. The day showing numbers of different font but I thought the pmk looked like the D5 of Proud's book. Could it be a replacement of a damaged day slug ? tapiapi also pointed out the same seller listed many Labuan stamps with the same pmk & date, almost all s.o.n. so I guess they were favored cancels from the post office. Comments from other collectors on this will be most welcomed and enlightening.

gantianexpress informed me that a UK seller is coming to KK end of the month who is a Chinese, might even be a Sabahan since she is retiring to live here soon. She had lost some mail selling to Sabah too. I wonder if her out going mail from Sabah will be safe in the future. I don't know if this is her strategy : If you can't beat them, join them ???!!!