Welcome to Stitcher's Guild,dwoodbury !
Some of our members own Bernina 930s,they can give you more and better information than I can.
I own three other vintage Bernina models.As far as I know all the old style Bernina presser feet fit on the 930.
Unfortunately,some of the old style presser feet don't have any numbers.Here
is a Bernina presser foot guide with pictures and numbers for newer sewing machine models,so you can see the difference when you compare them to the presser feet you own.Some dealers don't carry old style presser feet anymore.One has to look for used old style presser feet online or find a dealer who still has some.
New style Bernina presser feet have a cut out and are square.Old style Bernina presser feet don't have a cut out and are rounded.
There are generic Bernina low shank presser foot adapters available online to use with some other brand presser feet,in case you have some feet from another brand.Not all the adapters fit on some Bernina models though,even if it says on the package - for all Bernina models up to model 1630,(ask me how I know).
The bernina reps give all kinds of conflicting info, but usually end saying I should give up and buy a new bernina.
I think,people who say something like that are not very helpful or knowledgeable.They are only interested in selling brand new machines.If someone said that to me I would ask myself if that person even gives good customer support after buying a new machine at that dealer's place.
I think I bookmarked an old style Bernina presser foot reference chart.My eyes are too sore to search for it right now.Maybe another member has that chart too and can post it for you in the meantime.
Edited to add,Here
is one Bernina presser foot chart with old style presser foot numbers in parentheses,no pictures.I have another pdf chart I can't post here.It has foot numbers and order part numbers for some of the old style presser feet,if someone still sells new old style Bernina Presser feet.
I forgot to ask,do you have a Bernina 930 manual ? There are pictures and names of the 10 presser feet that came with the machine when new in the manual.If you don't have a manual,you can download a pdf copy for free from the Bernina site.
The Bernina 930 originally came with 10 presser feet.# 000,# 007,#016,#030,#145,#285,#419,#452,#470 and #560.If you have presser feet with other numbers,you can look them up on the chart I posted.