[Joe_G.]

Here is what is catalogued . . .

45-1 Bat at ready looking at camera

a. California Brown, C. N.Y's (B-0271, Fb)
b. California Brown, C., New Yorks (Fa)
c. California Brown, C., N.Y's (Fc)

45-2 In mask, catch, hands chest high

a. California Brown, C. N.Y's (B-0272, Es)
b. Brown, C., New Yorks (Fc)

45-3 Throw, R/hand chin high, mask in L/hand

a. California Brown, C. N.Y's (B-0273, Es, Em)
b. California Brown, C., N.Y's (Fc)
c. Brown, C., New Yorks (Fc)
d. Brown, C. New York (G)

45-4 Bat in L/hand at side

a. California Brown, C. N.Y's (B-0274)
b. California Brown, C., N.Y's (Fc)
c. Brown, C., New Yorks (Fc)
d. Brown, C., New York (PL) (Fc)

45-5 In mask, hands on thighs

a. California Brown, C. N.Y's (B-0275)
b. California Brown, C., N.Y's (Fc)

If you combine all five poses, California Brown covers most of the bases. Three types of 1887 cards (long numbered type B (flying hot dog advert), N175 small (Es), & N175 large (Em)), 1888 (both type Fa & Fb), 1889 (Fc), and 1890 (Fc PL) with a cabinet to boot (G). The only types not covered would be script, short numbered, and long numbered type A. There are likely some variations missing from this list, 1888 re-issues (Fa & Fb) were often not catalogued as completely. Over the years I've added many Detroit pose re-issues to the Cartophilic Listing.

Looks like you already have pose 2 covered with two variations but lots of room to grow on the other poses. Good Luck !!