Part of shutter mechanism?

Part of shutter mechanism ?, photoheliograph telescope

ID:	AST0967.24
Type:	Part of shutter mechanism?
Display location:	Not on display
Creator:	Dallmeyer, J. H.
Date made:	1873
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 140 x 70 x 70 mm
Parts:	Dallmeyer No. 3 (Photoheliograph) base and 5 bolts (AST0967.1) Base (AST0967.2) Right ascension axis (AST0967.3) Declination axis (AST0967.4) Object glass (AST0967.5) Shutter (AST0967.6) Counterweight (AST0967.7) right asscension drive (AST0967.8) Winding handle (AST0967.9) Connecting rod (AST0967.10) right ascension handle (AST0967.11) Declination handle (AST0967.12) Camera part (AST0967.13) Plateholder part (AST0967.14) Plateholder (AST0967.15) Handle for camera part (AST0967.16) Handle for camera part (AST0967.17) Unfinished camera part (AST0967.18) Spare part of declination axis (AST0967.19) Spare part of declination axis (AST0967.20) Part of object glass (AST0967.21) Part of view finder? (AST0967.22) Part of view finder? (AST0967.23) Part of shutter mechanism? (AST0967.24) Assorted screws and bolts (AST0967.25) Stand (AST0967.26) Counterweight (AST0967.27) Counterweight (AST0967.28) Counterweight (AST0967.29) Counterweight (AST0967.30) Counterweight (AST0967.31) Counterweight (AST0967.32) Counterweight (AST0967.33) Counterweight (AST0967.34) Counterweight (AST0967.35) Counterweight (AST0967.36) Counterweight (AST0967.37) Counterweight (AST0967.38)