Stars & swirls bowl - 9 [x] 3 stamped - ID help

Hi

Does anyone recognise this mark please?

Thanks

I’ve seen a number of these but still a mystery. Late 1980s - early 1990s. 
I wonder if it was a member of the London Potters group

Another one here -
https://www.20thcenturyforum.com/t26574-red-earthenware-pot-with-impressed-gate-mark-for-id

Thanks Naomi, wasn't sure if the 93 pointed to the year or something else.

NaomiM wrote:I’ve seen a number of these but still a mystery. Late 1980s - early 1990s. 
I wonder if it was a member of the London Potters group

Another one here -
https://www.20thcenturyforum.com/t26574-red-earthenware-pot-with-impressed-gate-mark-for-id

I think it must be the year. The numbers are all late 80s and early 90s so not a running total of how many they’ve made